Leviticus 19:29

19:29 Do not profane your daughter by making her a prostitute, so that the land does not practice prostitution and become full of lewdness.

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.