Leviticus 20:21

Overview - Leviticus 20
1	Of him that gives of his seed to Moloch.
4	Of him that favours such an one.
6	Of going to wizards.
7	Of sanctification.
9	Of him that curses his parents.
10	Of adultery.
11	Of incest.
13	Of sodomy.
15	Of bestiality.
18	Of uncleanness.
22	Obedience is required with holiness.
27	Wizards must be put to death.

Leviticus 20:21  (King James Version)
And if a man shall take his brother's wife, it is an unclean thing: he hath uncovered his brother's nakedness; they shall be childless.