Leviticus 20:17-21 New American Bible (Revised Edition) (NABRE)
17 If a man marries his sister, his father’s daughter or his mother’s daughter, and they have intercourse with each other, that is disgraceful; they shall be publicly cut off[a] from the people; the man shall bear the penalty of having had intercourse with his own sister. 18 If a man lies with a woman during her menstrual period and has intercourse with her, he has laid bare the source of her flow and she has uncovered it. The two of them shall be cut off from the people. 19 You shall not have intercourse with your mother’s sister or your father’s sister, because that dishonors one’s own flesh; they shall bear their penalty. 20 If a man lies with his uncle’s wife, he disgraces his uncle; they shall bear the penalty; they shall die childless. 21 If a man takes his brother’s wife, it is severe defilement and he has disgraced his brother; they shall be childless.