Leviticus 20:19-21

Amplified Bible, Classic 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 his close kin; they shall bear their iniquity.

²⁰ And if a man shall lie carnally with his uncle’s wife, he has uncovered his uncle’s nakedness; they shall bear their sin; they shall die childless [not literally, but in a legal sense].

²¹ And if a man shall take his brother’s wife, it is impurity; he has uncovered his brother’s nakedness; they shall be childless [not literally, but in a legal sense].