'Coals' in the Bible

Among the living beings there was something that looked like burning coals of fire, like torches moving back and forth among the living beings. The fire was bright, and lightning was flashing from the fire.

And the Lord spoke to the man (seventh angel) clothed in linen and said, “Go between the whirling wheels under the cherubim; fill your hands with coals of fire from between the cherubim and scatter them over the city.” And he entered as I watched.

“Then set the empty pot (Jerusalem) back on the coalsSo that it may be hotAnd its bronze may glowAnd its filthiness may be meltedAnd its rust (scum) may be consumed.