Deuteronomy 4:15

In Horeb — God, who in other places and times did appear in a similitude in the fashion of a man, now in this most solemn appearance, when he comes to give eternal laws for the direction of the Israelites in the worship of God, and in their duty to men, purposely avoids all such representations, to shew that he abhors all worship of images, or of himself by images of what kind soever, because he is the invisible God, and cannot be represented by any visible image.