Deuteronomy 13:9-13

Instead, you shall most certainly kill him; your hand shall be first against him to put him to death, and afterward the hand of all the people.

So you shall stone him to death, because he has attempted to drive you away from the Lord your God who brought you out of the land of Egypt, out of the house of slavery.

Then all Israel will hear about it and be afraid, and will not do such a wicked thing among you again.

“If you hear in one of your cities, which the Lord your God is giving you to live in, anyone saying that

some worthless men have gone out from among you and have seduced the inhabitants of their city, saying, ‘Let’s go and serve other gods’ (whom you have not known),