Deuteronomy 13:5-15

5But that prophet or that dreamer of dreams shall be put to death, because he has taught rebellion against the LORD your God, who brought you out of the land of Egypt and redeemed you out of the house of slavery, to make you leave the way in which the LORD your God commanded you to walk. So you shall purge the evil from your midst. 6“If your brother, the son of your mother, or your son or your daughter or the wife you embrace or your friend who is as your own soul entices you secretly, saying, ‘Let us go and serve other gods,’ which neither you nor your fathers have known, 7some of the gods of the peoples who are around you, whether near you or far off from you, from the one end of the earth to the other, 8you shall not yield to him or listen to him, nor shall your eye pity him, nor shall you spare him, nor shall you conceal him. 9But you shall kill him. Your hand shall be first against him to put him to death, and afterward the hand of all the people. 10You shall stone him to death with stones, because he sought to draw you away from the LORD your God, who brought you out of the land of Egypt, out of the house of slavery. 11And all Israel shall hear and fear and never again do any such wickedness as this among you. 12“If you hear in one of your cities, which the LORD your God is giving you to dwell there, 13that certain worthless fellows have gone out among you and have drawn away the inhabitants of their city, saying, ‘Let us go and serve other gods,’ which you have not known, 14then you shall inquire and make search and ask diligently. And behold, if it be true and certain that such an abomination has been done among you, 15you shall surely put the inhabitants of that city to the sword, devoting it to destruction, all who are in it and its cattle, with the edge of the sword.