Deuteronomy 13:12

but you shall surely kill him. Your hand shall be first on him to put him to death, and afterwards the hands of all the people.

You shall stone him to death with stones, because he has sought to draw you away from the LORD your God, who brought you out of the land of Egypt, out of the house of bondage.

All Israel shall hear, and fear, and shall not do any more wickedness like this among you.

certain wicked fellows have gone out from among you and have drawn away the inhabitants of their city, saying, “Let’s go and serve other gods,” which you have not known,

then you shall inquire, investigate, and ask diligently. Behold, if it is true, and the thing certain, that such abomination was done among you,

you shall surely strike the inhabitants of that city with the edge of the sword, destroying it utterly, with all that is therein and its livestock, with the edge of the sword.