Deuteronomy 13:1-4

1“Whatever I command you, you must take care to do—you are not to add to it or take away from it.

2“Suppose a prophet or a dreamer of dreams rises up among you and gives you a sign or wonder,

3and the sign or wonder he spoke to you comes true, while saying, ‘Let’s follow other gods’—that you have not known, and—‘Let’s serve them!’

4You must not listen to the words of that prophet or that dreamer of dreams—for Adonai your God is testing you, to find out whether you love Adonai your God with all your heart and with all your soul.