Ezekiel 1:5, 22, 26

Also from within it came the likeness of four living creatures. And this was their appearance: they had the likeness of a man.

The likeness of the firmament above the heads of the living creatures was like the color of an awesome crystal, stretched out over their heads.

And above the firmament over their heads was the likeness of a throne, in appearance like a sapphire stone; on the likeness of the throne was a likeness with the appearance of a man high above it.