Mal Malachi, chapter Book of Malachi, chapter 3
But who may abide the day of his coming? And who shall stand when he appeareth? For he is like a refiner's fire, and like fullers' soap; And he shall sit as a refiner and purifier of silver; and he shall purify the sons of Levi, and purge them as gold and silver; and there shall be they that shall offer unto the LORD offerings in righteousness. Psa 66:10; Isa 1:25; Ezk 22:22