Leviticus 18:12

18:12 You must not have sexual intercourse with your father’s sister; she is your father’s flesh.

Leviticus 18:6

Laws of Sexual Relations

18:6 “‘No man is to approach any close relative to have sexual intercourse with her. I am the Lord.

Leviticus 18:13

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