Malachi 3:1-4

1 Behold, I will send my messenger, and he shall prepare the way before me: and the LORD, whom you seek, shall suddenly come to his temple, even the messenger of the covenant, whom you delight in: behold, he shall come, said the LORD of hosts.

2 But who may abide the day of his coming? and who shall stand when he appears? for he is like a refiner's fire, and like fullers' soap:

3 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, that they may offer to the LORD an offering in righteousness.

4 Then shall the offering of Judah and Jerusalem be pleasant to the LORD, as in the days of old, and as in former years.