Leviticus 20:17

20:17 “‘If a man has sexual intercourse with his sister, whether the daughter of his father or his mother, so that he sees her nakedness and she sees his nakedness, it is a disgrace. They must be cut off in the sight of the children of their people. He has exposed his sister’s nakedness; he will bear his punishment for iniquity.

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 18:14

18:14 You must not expose the nakedness of your father’s brother; you must not approach his wife to have sexual intercourse with her. She is your aunt.

Leviticus 20:20-21

20:20 If a man has sexual intercourse with his aunt, he has exposed his uncle’s nakedness; they must bear responsibility for their sin, they will die childless. 20:21 If a man has sexual intercourse with his brother’s wife, it is indecency. He has exposed his brother’s nakedness; they will be childless.