Ezekiel 1:5, 22, 26

Within it there were figures resembling four living beings. And this was their appearance: they had human form.

Now over the heads of the living beings there was something like an expanse, like the awesome gleam of crystal, spread out over their heads.

Now above the expanse that was over their heads there was something resembling a throne, like lapis lazuli in appearance; and on that which resembled a throne, high up, was a figure with the appearance of a man.