Deuteronomy 4:11-19; Deuteronomy 4:29

11 You came near and stood at the foot of the mountain, while the mountain was burning with fire. Flames shot into the sky, shrouded in black clouds and deep darkness. 12 And the LORD spoke to you from the fire. You heard his words but didn't see his form; there was only a voice. 13 He proclaimed his covenant, which he commanded you to keep -- the Ten Commandments -- and wrote them on two stone tablets. 14 It was at that time that the LORD commanded me to issue the laws and regulations you must obey in the land you are about to enter and occupy." 15 "But be careful! You did not see the LORD's form on the day he spoke to you from the fire at Mount Sinai. 16 So do not corrupt yourselves by making a physical image in any form -- whether of a man or a woman, 17 an animal or a bird, 18 a creeping creature or a fish. 19 And when you look up into the sky and see the sun, moon, and stars -- all the forces of heaven -- don't be seduced by them and worship them. The LORD your God designated these heavenly bodies for all the peoples of the earth.
29 From there you will search again for the LORD your God. And if you search for him with all your heart and soul, you will find him."