Deuteronomy 17:2-7

2If there shall be found among you, within any of thy gates which the LORD thy God giveth thee, man or woman, that hath wrought wickedness in the sight of the LORD thy God, in transgressing his covenant, 3And hath gone and served other gods, and worshipped them, either the sun, or moon, or any of the host of heaven, which I have not commanded; 4And it shall be told thee, and thou hast heard of it, and enquired diligently, and, behold, it is true, and the thing certain, that such abomination is wrought in Israel: 5Then shalt thou bring forth to thy gates that man or that woman, who have committed that wicked thing, even that man or that woman, and shalt stone them with stones, till they die. 6At the mouth of two witnesses, or three witnesses, shall he that is worthy of death be put to death; but at the mouth of one witness he shall not be put to death. 7The hands of the witnesses shall be first upon him to put him to death, and afterward the hands of all the people. So thou shalt remove the evil from among you.