Deuteronomy 13:1-3

“If a prophet or someone who has dreams  arises among you and proclaims a sign or wonder to you, and that sign or wonder he has promised you comes about, but he says, ‘Let’s follow other gods,’ which you have not known, ‘and let’s worship them,’ do not listen to that prophet’s words or to that dreamer. For the LORD your God is testing you to know whether you love the LORD your God with all your heart and all your soul.