Cherubim: Form and Appearance of

…and within it was the form of four living creatures. And this was their appearance: They had a human form, …

In the midst of the living creatures was the appearance of glowing coals of fire, or of torches. Fire moved back and forth between the living creatures; it was bright, and lightning flashed out of it.

The creatures were darting back and forth as quickly as flashes of lightning.