Deuteronomy 17:2-7

2Suppose there is found in your midst—within one of your gates that Adonai your God is giving you—a man or woman who does what is evil in the eyes of Adonai your God by transgressing His covenant.

3This person goes and serves other gods and worships them—the sun or moon or any of the heavenly host, which I have not commanded.

4It is told to you and you have heard about it, and you investigate thoroughly and indeed it is true and the thing certain—this abomination has been done in Israel.

5Then you are to bring out to your gates that man or woman who has done this evil thing, and stone that man or woman with stones to death.

6By the word of two or three witnesses, the one who is to die is to be put to death. No one is to be put to death by the word of one witness.

7The hand of the witnesses is to be first to put him to death, and afterward the hand of all the people. So you are to purge the evil from your midst.