10. The nakedness of your son's daughter or your daughter's daughter you shall not uncover their nakedness, for they are your own nakedness.This parshah tell all the people we should "lay" with, including our neighbor's wife.
At the end, we learn that
21. And you shall not give any of your offspring to pass through for Molech. And you shall not profane the Name of your God. I am the Lord.Molech is a pagan ritual where you hand over a child to a pagan priest who would build two fires. The child was then passed through on foot between the two fires.
This child sacrifice was practiced by the Canaanites, Phoenicians, and related cultures in North Africa and the Levant.