Deuteronomy 17:3-5

3He may have started to worship false gods that I have commanded you not to worship. Perhaps he worships the sun, the moon or the stars.

4If you hear news like that, you must check the report carefully. If it is true that a wicked thing like that has happened in Israel,

5you must punish that person. Take the man or woman who has done that wicked thing to the gate of the town. Then you must throw stones at that person to kill them.