'Coals' in the Bible

But the bondmen and officers, having made a fire of coals (for it was cold), stood and warmed themselves; and Peter was standing with them and warming himself.

When therefore they went out on the land, they see a fire of coals there, and fish laid on it, and bread.

If therefore thine enemy should hunger, feed him; if he should thirst, give him drink; for, so doing, thou shalt heap coals of fire upon his head.