By calling upon the Lord to cut off the transgressors, Malachi prays for divine intervention and divine retribution. An example of this can be found in Isaiah 9:14). Isaiah wrote that the Lord cut off the unfaithful from Israel. He did so by empowering a foreign nation to conquer the northern kingdom of Israel and take them into captivity, from which they did not return.
12 May the LORD cut off from the tents of Jacob any descendant of the man who does this, who brings an offering to the LORD of hosts!