“The Atonement prepared from the Foundation of the World”

"Peter testified that Christ was the 'lamb without blemish and without spot, who verily was foreordained before the foundation of the world' (1 Peter 1:19-20). In the words of John the Revelator, Christ was the 'Lamb slain from the foundation of the world' (Revelation 13:8). Such expressions affirm that the plan of salvation was known and taught even before the creation of the earth (see D&C 132:8-11)." (McConkie and Millet, Doctrinal Commentary on the Book of Mormon, vol. 2, p. 76)