Malachi 3:2-3

“No one can prepare for that time or stand against him when he comes. He will be like a burning fire. He will be like the strong soap people use to make things clean. He will make the Levites clean. He will make them pure, like silver is made pure with fire! He will make them pure like gold and silver. Then they will bring gifts to the LORD, and they will do things the right way.