Yechezkel 10:9-11

Orthodox Jewish Bible

⁹ And when I looked, hinei, the four Ofanim (wheels) by the Keruvim, one Ofan beside one Keruv, and another Ofan beside another Keruv: and the appearance of the Ofanim was like the color of tarshish even (stone).

¹⁰ And as for their appearance, there was one demut (likeness) for the four of them, like that it was the Ofan within the Ofan.

¹¹ When they went, they went toward their four sides; they did not turn aside as they went, but to the makom (place) where the rosh looked they followed it; they did not turn aside as they went.