In Moses 6:55, Enoch says:
And the Lord spake unto Adam, saying: Inasmuch as thy children are conceived in sin, even so when they begin to grow up, sin conceiveth in their hearts, and they taste the bitter, that they may know to prize the good.
The Book of Giants agrees with Joseph Smith’s Enoch:
Let it be known to you that … your activity and that of [your] wives and of your children … through your fornication
What are the odds the Book of Moses would agree so strongly with other accounts of Enoch?