Leviticus 10:3

10:3 Moses then said to Aaron, “This is what the Lord spoke: ‘Among the ones close to me I will show myself holy, and in the presence of all the people I will be honored.’” So Aaron kept silent.

Leviticus 20:11

20:11 If a man has sexual intercourse with his father’s wife, he has exposed his father’s nakedness. Both of them must be put to death; their blood guilt is on themselves.