Malachi 2:12-13

2:12 May the Lord cut off from the community of Jacob every last person who does this, as well as the person who presents improper offerings to the Lord who rules over all!

2:13 You also do this: You cover the altar of the Lord with tears as you weep and groan, because he no longer pays any attention to the offering nor accepts it favorably from you.

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.