Leviticus 20:11 If there is a man who lies with his father's wife, he has uncovered his father's nakedness; both of them shall surely be put to death, their bloodguiltiness is upon them.

Deuteronomy 22:30 "A man shall not take his father's wife so that he will not uncover his father's skirt.

Deuteronomy 27:20 'Cursed is he who lies with his father's wife, because he has uncovered his father's skirt.' And all the people shall say, 'Amen.'

1 Corinthians 5:1 It is actually reported that there is immorality among you, and immorality of such a kind as does not exist even among the Gentiles, that someone has his father's wife. (NASB ©1995)