Deuteronomy 4:12

4:12 Then the Lord spoke to you from the middle of the fire; you heard speech but you could not see anything – only a voice was heard.

Deuteronomy 4:15-16

The Nature of Israel’s God

4:15 Be very careful, then, because you saw no form at the time the Lord spoke to you at Horeb from the middle of the fire. 4:16 I say this so you will not corrupt yourselves by making an image in the form of any kind of figure. This includes the likeness of a human male or female,