Ezekiel 10
9 Ref And 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 unto a beryl stone.
10 Ref And 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 turned not as they went, but to the place whither the head looked they followed it; they turned not as they went.