Leviticus 20:14

Whosoever shall take a woman and her mother, it is iniquity: they shall burn him and them with fire; so there shall not be iniquity among you.

And if a man take 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.

“‘If a man takes a wife and her mother, it is wickedness. They shall be burned with fire, both he and they, that there may be no wickedness among you.