Deuteronomy 13:11

8 Do not be guided by him or give attention to him; have no pity on him or mercy, and give him no cover;

9 But put him to death without question; let your hand be the first stretched out against him to put him to death, and then the hands of all the people.

10 Let him be stoned with stones till he is dead; because it was his purpose to make you false to the Lord your God, who took you out of the land of Egypt, out of the prison-house.

11 And all Israel, hearing of it, will be full of fear, and no one will again do such evil as this among you.

12 And if word comes to you, in one of the towns which the Lord your God is giving you for your resting-place,

13 That good-for-nothing persons have gone out from among you, turning the people of their town from the right way and saying, Let us go and give worship to other gods, of whom you have no knowledge;

14 Then let a full search be made, and let questions be put with care; and if it is true and certain that such a disgusting thing has been done among you;