Malachi 3:2-4

2 But who can endure the day of his coming? Who can stand when he appears? For he will be like a refiner’s fire or a launderer’s soap.
3 He will sit as a refiner and purifier of silver; he will purify the Levites and refine them like gold and silver. Then the LORD will have men who will bring offerings in righteousness,
4 and the offerings of Judah and Jerusalem will be acceptable to the LORD, as in days gone by, as in former years.