'Coals' in the Bible

In the middle of the living beings was something like burning coals of fire or like torches. It moved back and forth among the living beings. It was bright, and lightning was flashing out of the fire.

The Lord said to the man dressed in linen, "Go between the wheelwork underneath the cherubim. Fill your hands with burning coals from among the cherubim and scatter them over the city." He went as I watched.

Set the empty pot on the coals, until it becomes hot and its copper glows, until its uncleanness melts within it and its rot is consumed.