Deuteronomy 13:1-4

1If there shall arise among you a prophet, or a dreamer of dreams, and give thee a sign or a wonder,

2And the sign or the wonder shall come to pass, of which he spoke to thee, saying, Let us go after other gods, which thou hast not known, and let us serve them;

3Thou shalt not hearken to the words of that prophet, or that dreamer of dreams: for the LORD your God testeth you, to know whether ye love the LORD your God with all your heart and with all your soul.

4Ye shall walk after the LORD your God, and fear him, and keep his commandments, and obey his voice, and ye shall serve him, and cleave to him.