Leviticus 20:19-21

Revised Standard Version Catholic Edition

¹⁹ You shall not uncover the nakedness of your mother’s sister or of your father’s sister, for that is to make naked one’s near kin; they shall bear their iniquity. ²⁰ If a man lies with his uncle’s wife, he has uncovered his uncle’s nakedness; they shall bear their sin, they shall die childless. ²¹ If a man takes his brother’s wife, it is impurity; he has uncovered his brother’s nakedness, they shall be childless.