Ezekiel 1:18-22

As for their rims, they were high and awesome, and the rims of all four of them were covered with eyes all around.

Whenever the living beings moved, the wheels moved with them. And whenever the living beings rose from the earth, the wheels rose also.

Wherever the spirit was about to go, they would go in that direction. And the wheels rose just as they did; for the spirit of the living beings was in the wheels.

Whenever those went, they went; and whenever those stopped, they stopped. And whenever those rose from the earth, the wheels rose just as they did; for the spirit of the living beings was in the wheels. Vision of Divine Glory

Now over the heads of the living beings there was something like an expanse, like the awesome gleam of crystal, spread out over their heads.