Leviticus 20:14

20:14 If a man has sexual intercourse with both a woman and her mother, it is lewdness. Both he and they must be burned to death, so there is no lewdness in your midst.

Deuteronomy 27:23

27:23 ‘Cursed is the one who has sexual relations with his mother-in-law.’ Then all the people will say, ‘Amen!’

Amos 2:7

2:7 They trample on the dirt-covered heads of the poor;

they push the destitute away.

A man and his father go to the same girl;

in this way they show disrespect for my moral purity.