Leviticus 18:3-6

New International Version

³ You must not do as they do in Egypt, where you used to live, and you must not do as they do in the land of Canaan, where I am bringing you. Do not follow their practices.^{(A) 4} You must obey my laws^(B) and be careful to follow my decrees.^(C) I am the Lord your God.^{(D) 5} Keep my decrees and laws,^(E) for the person who obeys them will live by them.^(F) I am the Lord.

⁶ “‘No one is to approach any close relative to have sexual relations. I am the Lord.