Leviticus 20:20-22

²⁰'And a man who lieth with his aunt, the nakedness of his uncle he hath uncovered; their sin they bear; childless they die.

²¹'And a man who taketh his brother's wife — it is impurity; the nakedness of his brother he hath uncovered; childless they are.

²²'And ye have kept all My statutes, and all My judgments, and have done them, and the land vomiteth you not out whither I am bringing you in to dwell in it;