Ezekiel 1:13-16
English Standard Version
Chapter 1
13As for the likeness of the living creatures, their appearance was like burning coals of fire, like the appearance of torches moving to and fro among the living creatures. And the fire was bright, and out of the fire went forth lightning. 14And the living creatures darted to and fro, like the appearance of a flash of lightning.
15Now as I looked at the living creatures, I saw a wheel on the earth beside the living creatures, one for each of the four of them.
16As for the appearance of the wheels and their construction: their appearance was like the gleaming of beryl. And the four had the same likeness, their appearance and construction being as it were a wheel within a wheel.