Leviticus 20:21
And if a man shall take his brother's wife, it an unclean thing: he has uncovered his brother's nakedness; they shall be childless.
ā The Restored Word Bible
Context
19 And you shall not uncover the nakedness of your mother's sister, nor of your father's sister: for he uncovereth his near kin: they shall bear their iniquity.
20 And if a man shall lie with his uncle's wife, he has uncovered his uncle's nakedness: they shall bear their sin; they shall die childless.
21 And if a man shall take his brother's wife, it an unclean thing: he has uncovered his brother's nakedness; they shall be childless.
22 Ye shall therefore keep all my statutes, and all my judgments, and do them: that the land, where I bring you to dwell therein, spue you not out.
23 And ye shall not walk in the manners of the nation, which I cast out before you: for they committed all these things, and therefore I abhorred them.