Deuteronomy 17:3-5

3and that person has gone and 1served other gods and worshiped them, 2or the sun, the moon, or any of the heavenly 3lights, 4which I have commanded not to do,

4and if it is reported to you and you have heard about it, then you shall investigate thoroughly. And 5if it is true and the report is trustworthy that this detestable thing has been done in Israel,

5then you are to bring out to your gates that man or woman who has done this evil deed, that is, the man or the woman, and 6you shall stone them to 7death.