'Fire' in the Bible

If only there was one among you who would see that the doors were shut, so that you might not put a light to the fire on my altar for nothing! I have no pleasure in you, says the Lord of armies, and I will not take an offering from your hands.

But by whom may the day of his coming be faced? and who may keep his place when he is seen? for he is like the metal-tester's fire and the cleaner's soap.