Malachi 3:3

3:3 He will act like a refiner and purifier of silver and will cleanse the Levites and refine them like gold and silver. Then they will offer the Lord a proper offering.

Malachi 3:17

3:17 “They will belong to me,” says the Lord who rules over all, “in the day when I prepare my own special property. I will spare them as a man spares his son who serves him.

Malachi 4:3

4:3 You will trample on the wicked, for they will be like ashes under the soles of your feet on the day which I am preparing,” says the Lord who rules over all.