Deuteronomy 13:12-14 NIV

[12] If you hear it said about one of the towns the LORD your God is giving you to live in [13] that troublemakers have arisen among you and have led the people of their town astray, saying, “Let us go and worship other gods” (gods you have not known), [14] then you must inquire, probe and investigate it thoroughly. And if it is true and it has been proved that this detestable thing has been done among you,