Deuteronomy 4:15-18

“So pay attention and watch yourselves carefully—for you did not see any form [of God] on the day the LORD spoke to you at Horeb from the midst of the fire— so that you do not act corruptly and make for yourselves a carved or sculpted image [to worship] in the form of any figure, the likeness of male or female, the likeness of any animal that is on the earth, or of any winged bird that flies in the sky, the likeness of anything that crawls on the ground, or of any fish that is in the waters beneath the earth.