Malachi 3:1-2

1“Behold, I am going to send My messenger, and he will prepare and clear the way before Me. And the Lord [the Messiah], whom you seek, will suddenly come to His temple; the Messenger of the covenant, in whom you delight, behold, He is coming,” says the Lord of hosts.

2“But who can endure the day of His coming? And who can stand when He appears? For He is like a refiner’s fire and like launderer’s soap [which removes impurities and uncleanness].