Deuteronomy 17:5-7

New Catholic Bible

⁵ you are to bring that man or woman who has done this evil thing to the town gates, and you shall stone that man or woman to death.

⁶ A person can be put to death upon the testimony of two or three witnesses; a person is not to be put to death upon the testimony of a single witness. ⁷ The witnesses will be the first to raise their hand against him to put him to death, then all of the people will raise their hands against him, in order to purge this evil from your midst.