Leviticus 18:13

18:13 You must not have sexual intercourse with your mother’s sister, because she is your mother’s flesh.

Leviticus 18:7

18:7 You must not expose your father’s nakedness by having sexual intercourse with your mother. She is your mother; you must not have intercourse with her.

Leviticus 20:9

Family Life and Sexual Prohibitions

20:9 “‘If anyone curses his father and mother he must be put to death. He has cursed his father and mother; his blood guilt is on himself.