Deuteronomy 13:2-4

Amplified Bible

² and the sign or the wonder which he spoke (foretold) to you comes to pass, and if he says, ‘Let us follow after other gods (whom you have not known) and let us serve and worship them,’ ³ you shall not listen to the words of that prophet or that dreamer of dreams; for the Lord your God is testing you to know whether you love the Lord your God with all your heart and mind and all your soul [your entire being]. ⁴ You shall walk after the Lord your God and you shall fear [and worship] Him [with awe-filled reverence and profound respect], and you shall keep His commandments and you shall listen to His voice, and you shall serve Him, and cling to Him.