'Coals' in the Bible

As for the likeness of the living creatures, their appearance [was] like burning coals of fire, like the appearance of torches. It [was] moving to and fro between the living creatures, and {the fire was very bright} and lightning [was] going out from the fire.

And he spoke to the man clothed in linen and said, "Go {in among the wheel area under the cherubim} and fill the hollow of your hands [with] coals of fire from among the cherubim, and toss [them] on the city." And he went [right] before my eyes.

And {make it stand} empty upon its burning coals so that it may become hot, and its copper may become molten and be melted in the midst of it, [so that] its uncleanness and its rust be consumed.