The following are passage that talk about Apostasy - as an
individual or as a nation; get the Book of Mormon out that you've ordered
and read them each:
2 Nephi 25:19-24
2 Nephi 28
Jacob 1:15-19
Jacob 7:1-23 … the anti-Christ Sherem
Jarom 1:3
Mosiah 26:6 ... deceived with flattering words to commit sins
Alma 1 ... Nehor's teachings
Alma 4
Alma 9:14-20
Alma 15:17-19
Alma 30 ... Korihor
Alma 31 ... Zoramites and their synagogue
Alma 45:22-24
Alma 46:7
4 Nephi 4 ... the rise and fall of a people
Alma 62:48-51
Helaman 3:1, 2, 33
Helaman 4:1-5
Helaman 4:11-26
Helaman 6:16-17, 39
Helaman 7:21
Helaman 11:22-23, 37
Helaman 12:2-6
Heleman 16:13-23
3 Nephi 6:10-30
3 Nephi 7:1-7
Mormon 3:9
Mormon 8:26-40