Albert Barnes Commentary Malachi 2:3

"Behold, I will rebuke your seed, and will spread dung upon your faces, even the dung of your feasts; and ye shall be taken away with it." — Malachi 2:3 (ASV)

Behold, I will rebuke the seed for your sake -, that is, so that it should not grow. He who works by His sustaining will all the operations of nature, would at His will withhold them. Neither priests nor Levites cultivated the soil; yet, since the tithes were assigned to them, the diminution of the harvest affected them. The meal-offering too was a requisite part of the sacrifice. (Joel 2:14).

And spread dung upon your faces, the dung of your solemn feasts -, or, “of your sacrifices.” It was by the law carried outside the camp and burned with the animal itself. They had brought before the face of God maimed, unfitting sacrifices; they should have them cast back, with their refuse, upon them; “as a lord that rejects a gift, brought to him by his servant, casts it back at him.” “Of your sacrifices, not of Mine, for I am not worshiped in them: you seek to please, not Me, but yourselves.” So God said of Eli (1 Samuel 2:30), them that honor Me I will honor, and they that despise Me shall be lightly esteemed.

And one shall take you away with it -, literally “to it.” They should be swept away, as if they were an appendage to it, as God said (1 Kings 14:10), I will take away the remnant of the house of Jeroboam, as a man taketh away dung, until all be gone. As are the offerings, so shall it be with the offerers.