“Behold, I will corrupt your seed, and spread dung upon your faces, even the dung of your solemn feasts; and one shall take you away with it.” (Malachi 2:3)
Up to this point, the priestly lineage was distinct and identifiable (Ezra 2, Nehemiah 7). This distinction has deteriorated down through the ages. This may be what is meant by “corrupt your seed.” This is not to say that the twelve tribes have been permanently lost. God maintains His people, and He will restore the twelve tribes of Israel to their rightful place during the Millennial Kingdom. Also, the Lord may be telling them that He would give them despicable offspring such as themselves. Since they would not fear God, neither would their children. This of course would lead to further disgrace and damage.
The dung of the sacrifices was removed from the place of offering and burned outside the limits of the camp or city (Leviticus 8:17). To have this refuse smeared on the face would have been one of the most abominable fates a priest could endure, yet such is what God promised them. Abominable actions deserve abominable rewards. The dung upon the face was not the worst of what they had to look forward to. God also said, “...and one shall take you away with it.” As the dung that was removed and forever out of sight and mind, so would these ungodly priests be removed from God's presence. Unless they should repent, the fires of hell awaited. Their promised fate is a sobering thought. God respects the face of no man. Thousands of people profess Christ with their mouth while their heart is far from Him. Unless such people repent, they will, as refuse, be removed from God's presence and consigned to the flames.