Ezekiel 10
9 Ref I looked, and behold, four wheels beside the cherubim, one wheel beside one cherub, and another wheel beside another cherub; and the appearance of the wheels was like a beryl stone.
10 Ref As for their appearance, they four had one likeness, as if a wheel have been within a wheel.
11 Ref When they went, they went in their four directions: they didn't turn as they went, but to the place where the head looked they followed it; they didn't turn as they went.