Deuteronomy 13:11

8 Thou shalt not consent unto him, nor hearken unto him; neither shall thine eye pity him, neither shalt thou spare, neither shalt thou conceal him:

9 But thou shalt surely kill him; thine hand shall be first upon him to put him to death, and afterwards the hand of all the people.

10 And thou shalt stone him with stones, that he die; because he hath sought to thrust thee away from the LORD thy God, which brought thee out of the land of Egypt, from the house of bondage.

11 And all Israel shall hear, and fear, and shall do no more any such wickedness as this is among you.

12 If thou shalt hear say in one of thy cities, which the LORD thy God hath given thee to dwell there, saying,

13 Certain men, the children of Belial, are gone out from among you, and have withdrawn the inhabitants of their city, saying, Let us go and serve other gods, which ye have not known;

14 Then shalt thou enquire, and make search, and ask diligently; and, behold, if it be truth, and the thing certain, that such abomination is wrought among you;