Leviticus 20:17-19

New Century Version

¹⁷ “‘It is shameful for a brother to marry his sister, the daughter of either his father or his mother, and to have sexual relations with her. In front of everyone they must both be cut off from their people. The man has shamed his sister, and he is guilty of sin.

¹⁸ “‘If a man has sexual relations with a woman during her monthly period, both the woman and the man must be cut off from their people. They sinned because they showed the source of her blood.

¹⁹ “‘Do not have sexual relations with your mother’s sister or your father’s sister, because that would shame a close relative. Both of you are guilty of this sin.