Ezekiel 1:22-25

And over the head of the living creature there was the likeness of a firmament, like the terrible crystal to look upon, stretched forth over their heads above. And under the firmament were their wings straight, the one toward the other: every one had two which covered on this side, and every one had two which covered on that side, their bodies. And when they went, I heard the noise of their wings like the noise of great waters, like the voice of the Almighty, a noise of tumult like the noise of a host: when they stood, they let down their wings. And there was a voice above the firmament that was over their heads: when they stood, they let down their wings.