Leviticus 20:12

12 And if a man lies with his daughter-in-law, both of them shall surely be put to death; they have wrought mixture; their blood shall be upon them.

Leviticus 20:12 In-Context

10 And the man that commits adultery with another man’s wife, he that commits adultery with his neighbour’s wife, the adulterer and the adulteress shall surely die.
11 And the man that lies with his father’s wife has uncovered his father’s nakedness; both of them shall surely die; their blood shall be upon them.
12 And if a man lies with his daughter-in-law, both of them shall surely be put to death; they have wrought mixture; their blood shall be upon them.
13 If a man shall join himself with a male as with a woman, both of them have committed an abomination; they shall surely be put to death; their blood shall be upon them.
14 And if a man takes a wife and her mother, it is wickedness; they shall be burnt with fire, both he and they; that there be no wickedness among you.
The Jubilee Bible (from the Scriptures of the Reformation), edited by Russell M. Stendal, Copyright © 2000, 2001, 2010