The Bible Dictionary says of the Atonement:
The word describes the setting "at one" of those who have been estranged, and denotes the reconciliation of man to God. Sin is the cause of the estrangement, and therefore the purpose of atonement is to correct or overcome the consequences of sin.
Adam offered sacrifices to the Lord to be obedient. An angel appears unto Adam and tells him the purpose of the sacrifices he is performing. The angel explains that the sacrifices foreshadowed the atonement of Christ, Moses 5:5 and Moses 5:6-8. By offering a sacrifice Aaron made an atonement for himself and the people, Leviticus 9:7.
We can't be justified by the law of Moses, Acts 13:38-39. "The law of Moses availeth nothing except if were through the atonement of his blood," Mosiah 3:15. The blood of bulls and goats can not take away sin, but instead the law of Moses was a shadow of good things to come, Hebrews 10:1-4.
Abinadi explains how the Law of Moses relates to the atonement, Mosiah 13:27-35. The Law of Moses points to Christ and Christ is the deliverance from death, 2 Nephi 11:4-6. The law of Moses is a shadow of the atonement which comes through Jesus Christ, Mosiah 16:14-15. Christ's atonement fulfills the law of Moses Alma 34:13.
The High Priest went into the Holy of Holies once a year to offer sacrifices for the sins of the people, Hebrews 9:7. Likewise Christ died for the sins of the people. Hebrews 9:11-14. The High Priest went into the Holy of Holies once a year, but Christs sacrifice need only be made once, Hebrews 9:24-28. This scripture compares Christ offering up himself to the high priest making offering for the people. The difference is that Christ didn't have to offer sacrifice for Himself and he only needed to do it once, Hebrews 7:27-28. If one of the rulers sinned he is to make a sacrifice as an atonement, Leviticus 4:23-26. Likewise the same for the common people, except that the common people are to offer a female instead of a male, Leviticus 4:27-32. The offering of the body of Jesus Christ took away sin once and for all and didn't need to be repeated as the offering of the Law of Moses, Hebrews 10:9-14. In this scripture when he says "He taketh away the first, that he may establish the second" I think Paul is referring to Chris taking away the Law of Moses to establish the new covenant.
The lifting up of the brazen serpent on a pole was symbolic of Christ being lifted up on the cross, John 3:14-17 and Alma 33:19-20. As Moses lifted up the brazen serpent, Christ was lifted up to save His people Helaman 8:14-15.
Christ came to take away the sins of every man, Alma 5:48. The good shepherd lay down his life for the sheep, John 10:14-18. The sins of all mankind are laid on Christ, Mosiah 14:4-6. Abinadi quoted those words from Isaiah, Isaiah 53:4-6. Christ was crucified for the sins of the world, D&C 21:9, D&C 35:2, D&C 46:13 and D&C 53:2. Christ will suffer and die to atone for the sins of the people, Alma 33:22 and 3 Nephi 11:13-14.
Christ suffered for us all 2 Nephi 9:21 and D&C 18:11-12. "He suffereth the pains of all men" so that they can be saved in the kingdom of God, 2 Nephi 9:20-24. God, has suffered these things for all, that they might not suffer if they would repent, D&C 19:16-19. Christ "suffered for sins, the just for the unjust, that he might bring us to God," 1 Peter 3:18-21.
The suffering that Christ went through was more intense than what it is possible for man to endure, Mosiah 3:7. The anguish that Christ felt in the garden was so great that blood came from every pore, Mosiah 3:7 and Luke 22:44.
Christ's atonement included taking upon him our sicknesses and infirmities, Matthew 8:16-17. Christ will "take upon him the pains and the sicknesses of his people," Alma 7:11-14.
Christ was "was lifted up upon the cross and slain for the sins of the world," 1 Nephi 11:32-33, John 12:32 and 3 Nephi 27:14-16. "Who his own self bare our sins in his own body on the tree," 1 Peter 2:21-25. Redemption comes through the sacrifice of the Son of God upon the cross, D&C 138:35.
Christ is able to succour his people because he came to earth and was tempted, Hebrews 2:14-18. Christ drank the bitter cup and took upon Himself the sins of the world, 3 Nephi 10:10-12. The Lamb of God hath overcome and trodden the wine-press alone, D&C 88:106.
Also He has reconciled us to himself by Jesus Christ, 2 Corinthians 5:18-19.
Isaiah foretells that Christ would suffer for our sins. "He hath born our griefs and carried our sorrows, Isaiah 53:3-5. "The Lord hath laid on him the iniquity of us all," 6-10 "And he bare the sin of many, and made intercession for the transgressors," 11-12. The Book of Mormon version is in Mosiah 14:3-12. There is very little difference between the two versions. The Bible uses more ":" instead of ";". Also the Bible use more old type language "hath" verses "has." The Bible capitalizes Lord as LORD.
Christ stands betwixt us and justice, Mosiah 15:7-12. Mercy can't rob justice Alma 42:25. We needed an infinite atonement to overcome death so we don't end up like the devil and his angles, 2 Nephi 9:7-8. This scripture also tells us that the atonement satisfieth the dmands of justice. Paul talks about Christ reconciling men to God, 2 Corinthians 5:18-21. The Son of man came to give his life as ransom for us, Matthew 20:27-28 and 1 Timothy 2:5-6.
The atonement satisfieth the demands of justice and covers those where there is no law, 2 Nephi 9:25-26. Those that die without a knowledge of God are redeemed through Christ, Mosiah 15:23-25. Little children are saved through the atonement of Christ. Also the only way salvation can come is through Jesus Christ, Mosiah 3:16-18. Baptizing children is denying the power of the atonement, Moroni 8:19-20. Little children are sanctified through the atonement of Christ, D&C 29:46 and D&C 74:7.
When Christ was baptized the scriptures refer to Christ as the lamb that should take away the sins of the world, 1 Nephi 10:10-11 and 2 Nephi 31:4. Those who sin transgress the law, but Christ takes away our sins, 1 John 3:4-7. "All have sinned and come short of the glory of God," Romans 3:23-25. Christ "taketh away the sins of the world," John 1:29 and Alma 7:14. Christ took upon Himself the sins of the world, Mosiah 26:23.
Christ is the propitiation for the whole world, 1 John 2:2. Wikipedia says that propitiation is the act of appeasing or making well disposed (from Latin propitiāre, to appease, from propitius, gracious), especially a deity, thus incurring divine favor or avoiding divine retribution. Christ died and made intercession for us, Romans 8:34. Christ is our advocate with the Father, D&C 110:4.
It is through Christ that we are redeemed from the fall, Mosiah 3:11 and Helaman 14:15-18. There is no salvation except through the atonement, Mosiah 4:7 and Mosiah 3:18, 1 Timothy 2:5, and Alma 42:14. "... And since man had fallen he could not merit anything of himself..." Alma 22:13-14. A great and last sacrifice must be made Alma 34:8-10. Without Christ's atonement we would have remained in our lost and fallen state forever Mosiah 16:3-5. The natural man in an enemy to God, Mosiah 3:19.
No man cometh unto the Father but by Christ, John 14:6. Christ is the only name through which salvation can come, Moses 6:51-54. There is no other way or means whereby man can be saved, only in and through Christ, Alma 38:9. There is no redemption except through Jesus Christ, Alma 21:9. The only way that we can receive eternal life is through Christ, D&C 59:23.
If it weren't for the Redeemer all mankind would remain in their lost and fallen state, 1 Nephi 10:4-6. Without the redemption that Christ made all mankind would be lost, Mosiah 15:18-20 and Jacob 7:12. "Redemption cometh in and through the Holy Messiah," 2 Nephi 2:6-10.
The 3rd article of faith tells us that we can be saved through the atonement of Christ, Article of Faith 3. All mankind have life through Christ, Ether 3:13-14. Alma taught the people the words of Abinadi about the coming of Christ, Mosiah 18:2.
Christ comes in the fullness of time to bring salvation unto men, 2 Nephi 2:3-4. It is interesting that in the Book of Mormon fullness is spelled "fulness." According to a quote from the "theboard.byu.edu" that spelling was common in Joseph Smith's time and is still used outside of the US.
Redemption comes through Christ, 3 Nephi 9:17. Christ is our Redeemer, 3 Nephi 22:5, Isaiah 54:5 and Moroni 8:8. Christ shall redeem His people, Alma 11:40-41. We receive the atonement through Jesus Christ, Romans 5:11.
Christ is the Savior of the world, 1 Nephi 13:40, 1 Nephi 21:26, 1 Nephi 22:12 and 2 Nephi 6:18.
We need to put our trust in the Lord and in His atonement, Mosiah 4:6. We have hope through the atonement of Christ, Moroni 7:41. Men are brought back into the presence of God because of Jesus Christ, Mormon 9:12-13.
Christ came into the world to bring redemption unto the world, 3 Nephi 9:21-22. "The Lamb is slain from the foundation of the world," Revelation 13:8 and Moses 7:47.
The righteous "reap the salvation of their souls, according to the power and deliverance of Jesus Christ," Alma 9:27-28. Be reconciled to God through the atonement of Christ, Jacob 4:11-12. Christ is "the author of eternal salvation unto all them that obey Him," Hebrews 5:8-10. Has the atonement brought about that mighty change in our hearts? Alma 5:14-15. Those who hold the Priesthood take advantage of the atonement, Alma 13:5.
Christ put all things in subjection under his feet, Hebrews 2:8-9. The atonement is infinite, 2 Nephi 25:16. Jesus wrought out a perfect atonement, D&C 76:69.
The Children of Israel are commanded not to eat blood because blood is the life of the flesh and is used for the atonement of the soul in the sacrifices of the law of Moses, Leviticus 16:10-11. Zechariah 9:11.
The only way man can be saved is through the atoning blood of Jesus Christ," Helaman 5:9-12. We are washed clean through the blood of Christ, 3 Nephi 27:19. Christ's blood "cleanseth us from all sin," 1 John 1:7-9. We are made perfect through the blood of the everlasting covenant, Hebrews 13:20-21>. We are not redeemed by sliver and gold but by the blood of Christ, 1 Peter 1:18-21. Turn unto the Lord that you may be cleansed by the blood of the Lamb, Mormon 9:6.
Christ did not sin but his blood was shed so that men could have everlasting life, D&C 45:3-5. We are sanctified by the shedding of Christ's blood, Moroni 10:32-33. The Lord spilt his blood for man, D&C 38:4.
In the book of Revelation John sees those who have washed their robes, and made them white in the blood of the Lamb, Revelation 7:13-14. Other scriptures that talk about robes of the righteous being made white with the blood of the lamb are: 1 Nephi 12:10-11, Alma 13:10-12, Alma 34:36, and Ether 13:9-11. Our garments can be "made white through the blood of Christ, who will come to redeem his people from their sins," Alma 5:27.
The enemies of Christ are overcame by the blood of the Lamb, Revelation 12:10-11.
When the people of Anti-Nephi-Lehies buried their swords it was so that they would be washed bright through the blood of Christ, Alma 24:13.
The resurrection is part of the atonement. Without the resurrection our faith would be vain and we all perish, 1 Corinthians 15:13-19. Jesus is the resurrection and the life, John 11:25. The resurrection comes about because of the Lamb of God, D&C 76:39. Christ overcomes the temporal death, 2 Nephi 9:10-13.
"The atonement bringeth to pass the resurrection of the dead," Alma 42:23-24 and Mosiah 16:7-8. The resurrection applies to all men, 2 Nephi 9:21-22 and 1 Corinthians 15:20. This scripture talks both about the resurrection and redemption from sin, 2 Nephi 10:24-25.
Because God loved us He sent His Son to the world, 1 John 4:9-11. Heavenly Father "spared not his own Son, but delivered him up for us all," Romans 8:32. "For the wages of sin is death; but the gift of God is eternal life," Romans 6:23. Lehi tells of Christ redeeming his soul and that he is encircled by the Lord's love, 2 Nephi 1:15. Christ is ever ready to gather His people as a hen gathers its chicks, D&C 29:1-2. Christ died for us while we were sinners because of His love for us, Romans 5:6-10. Christ "layeth down his own life that he may draw all men unto him, because he loveth the world, 2 Nephi 26:23-24 and Ether 12:33-34. Christ humbled himself, and became obedient to death on the cross, Philippians 2:7-10.
Christ offered "his soul an offering for sin," Mosiah 14:10-12 and Isaiah 53:3-6. The crucifiers did not take Jesus's life, but instead He gave it up, John 19:30. The Messiah didn't give His life for Himself, Daniel 9:26.
Through Christ all can be saved except for the sons of perdition, D&C 76:40-43.
Mormon encourages his son by having him remember what Christ did for us, Moroni 9:25.
At the last supper Jesus institutes the sacrament in remembrance of his atonement, Matthew 26:26-28 and Luke 22:19-20.
When Joseph F. Smith saw the vision recorded in D&C 138 he was pondering on the atonement of Christ, D&C 138:1-4.
The knowledge of the Savior will spread to every people, Mosiah 3:20.
Korihor taught against the need for an atonement, Alma 30:17 and Alma 30:26.
This scripture say "he might reconcile both unto God in one body by the cross." I had a hard time understanding what both are. I think it has to do with reconciling the law of Moses unto man. Ephesians 2:13-17.