Deuteronomy 17:1-7

17:1 You must not sacrifice to him a bull or sheep that has a blemish or any other defect, because that is considered offensive to the Lord your God. 17:2 Suppose a man or woman is discovered among you – in one of your villages that the Lord your God is giving you – who sins before the Lord your God and breaks his covenant 17:3 by serving other gods and worshiping them – the sun, moon, or any other heavenly bodies which I have not permitted you to worship. 17:4 When it is reported to you and you hear about it, you must investigate carefully. If it is indeed true that such a disgraceful thing is being done in Israel, 17:5 you must bring to your city gates that man or woman who has done this wicked thing – that very man or woman – and you must stone that person to death. 17:6 At the testimony of two or three witnesses they must be executed. They cannot be put to death on the testimony of only one witness. 17:7 The witnesses must be first to begin the execution, and then all the people are to join in afterward. In this way you will purge evil from among you.