'Coals' in the Bible

and the servants and the officers were standing, having made a fire of coals, because it was cold, and they were warming themselves, and Peter was standing with them, and warming himself.

when, therefore, they came to the land, they behold a fire of coals lying, and a fish lying on it, and bread.

I will recompense again, saith the Lord;' if, then, thine enemy doth hunger, feed him; if he doth thirst, give him drink; for this doing, coals of fire thou shalt heap upon his head;