Deuteronomy 13:2-3

2and the sign or the wonder come to pass that he told unto thee, when he said, Let us go after other 1gods, whom thou hast not known, and let us serve them,

3— thou shalt not hearken unto the words of that prophet, or that dreamer of dreams; for Jehovah your 2God proveth you, to know whether ye love Jehovah your 3God with all your heart and with all your soul.