Ezekiel 1:5, 22, 26

And from the midst of it came the likeness of four living creatures. And this was their appearance: they had a human likeness

Over the heads of the living creatures there was the likeness of an expanse, shining like awe-inspiring crystal, spread out above their heads.

And above the expanse over their heads there was the likeness of a throne, in appearance like sapphire; and seated above the likeness of a throne was a likeness with a human appearance.