Ezekiel 10:8-10

New Revised Standard Version Catholic Edition

⁸ The cherubim appeared to have the form of a human hand under their wings.

⁹ I looked, and there were four wheels beside the cherubim, one beside each cherub; and the appearance of the wheels was like gleaming beryl. ¹⁰ And as for their appearance, the four looked alike, something like a wheel within a wheel.