Deuteronomy 4:12-15

JPS_ASV_Byz(i) 12 And the LORD spoke unto you out of the midst of the fire; ye heard the voice of words, but ye saw no form; only a voice. 13 And He declared unto you His covenant, which He commanded you to perform, even the ten words; and He wrote them upon two tables of stone. 14 And the LORD commanded me at that time to teach you statutes and ordinances, that ye might do them in the land whither ye go over to possess it. 15 Take ye therefore good heed unto yourselves - for ye saw no manner of form on the day that the LORD spoke unto you in Horeb out of the midst of the fire -