Deuteronomy 13:1-15

1If a prophet or aa dreamer of dreams arises among you and gives you a sign or a wonder, 2and bthe sign or wonder that he tells you comes to pass, and if he says, ‘Let us go after other gods,’ which you have not known, ‘and let us serve them,’ 3you shall not listen to the words of that prophet or that dreamer of dreams. For the Lord your God cis testing you, to know whether you love the Lord your God with all your heart and with all your soul. 4You shall dwalk after the Lord your God and fear him and keep his commandments and obey his voice, and you shall serve him and ehold fast to him. 5But fthat prophet or that dreamer of dreams shall be put to death, because he has taught rebellion against the Lord your God, who brought you out of the land of Egypt and redeemed you out of the house of slavery, to make you leave the way in which the Lord your God commanded you to walk. gSo you shall purge the evil
Or  evil person
from your midst.

6 iIf your brother, the son of your mother, or your son or your daughter or jthe wife you embrace
Hebrew  the wife of your bosom
or your friend lwho is as your own soul entices you secretly, saying, ‘Let us go and serve other gods,’ mwhich neither you nor your fathers have known,
7some nof the gods of the peoples who are around you, whether near you or far off from you, from the one end of the earth to the other, 8you shall onot yield to him or listen to him, nor pshall your eye pity him, nor shall you spare him, nor shall you conceal him. 9But you shall kill him. qYour hand shall be first against him to put him to death, and afterward the hand of all the people. 10 rYou shall stone him to death with stones, because he sought to draw you away from the Lord your God, who brought you out of the land of Egypt, out of the house of slavery. 11And sall Israel shall hear and fear and never again do any such wickedness as this among you.

12If you hear in one of your cities, which the Lord your God is giving you to dwell there, 13that certain tworthless fellows have gone out among you and have drawn away the inhabitants of their city, saying, ‘Let us go and serve other gods,’ which you have not known, 14then you shall inquire and make search and ask udiligently. And behold, if it be true and certain that such an abomination has been done among you, 15you shall surely put the inhabitants of that city to the sword, devoting it to destruction,
That is, setting apart ( devoting) as an offering to the Lord (for destruction)
all who are in it and its cattle, with the edge of the sword.
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