'Fire' in the Bible

So he said to his servants, "Look at the tract of land of Joab {next to mine}, for he has barley plants there. Go, set it ablaze with fire." So the servants of Absalom set the tract of land ablaze with fire.

Then Joab got up and went to Absalom, to the house, and said to him, "Why have your servants set my tract of land ablaze with fire?"

Smoke went up from his nostrils and fire from his mouth. Burning coals devoured, they burned from him.

From the brightness before him flamed burning coals of fire.

And if a man wants to touch them, he must use an iron instrument or the shaft of a spear; then they [are] consumed entirely with fire on the spot."