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.

Leviticus 21:2

21:2 except for his close relative who is near to him: his mother, his father, his son, his daughter, his brother,