Leviticus 20:10, 23, 27

If a man commits adultery with his neighbor’s wife, both the adulterer and the adulteress must be put to death.

You must not walk in the statutes of the nation which I am about to drive out before you, because they have done all these things and I am filled with disgust against them.

“‘A man or woman who has in them a spirit of the dead or a familiar spirit must be put to death. They must pelt them with stones;their blood guilt is on themselves.’”