2 Nephi 28:20 teaches the concept of progressive revelation.
2 Nephi 25:28, The Book of Mormon, The Church of Jesus Christ of Latter Day Saints, accessed November 6, 2023
30 For behold, thus saith the Lord God: I will give unto the children of men line upon line, precept upon precept, here a little and there a little; and blessed are those who hearken unto my precepts, and lend an ear unto my counsel, for they shall learn wisdom; for unto him that receiveth I will give more; and from them that shall say, We have enough, from them shall be taken away even that which they have.