Deuteronomy 13:2

2 and if the sign or wonder spoken of takes place, and the prophet says, “Let us follow other gods” (gods you have not known) “and let us worship them,”

Read Deuteronomy 13:2 Using Other Translations

And the sign or the wonder come to pass, whereof he spake unto thee, saying, Let us go after other gods, which thou hast not known, and let us serve them;
and the sign or wonder that he tells you comes to pass, and if he says, 'Let us go after other gods,' which you have not known, 'and let us serve them,'
and the predicted signs or miracles occur. If they then say, ‘Come, let us worship other gods’—gods you have not known before—