21:1-17 Here is an explanation of the parable in the last chapter. It is declared that the Lord was about to cut off Jerusalem and the whole land, that all might know it was his decree against a wicked and rebellious people. It behoves those who denounce the awful wrath of God against sinners, to show that they do not desire the woful day. The example of Christ teaches us to lament over those whose ruin we declare. Whatever instruments God uses in executing his judgments, he will strengthen them according to the service they are employed in. The sword glitters to the terror of those against whom it is drawn. It is a sword to others, a rod to the people of the Lord. God is in earnest in pronouncing this sentence, and the prophet must show himself in earnest in publishing it.

14. smite … hands together—(Nu 24:10), indicative of the indignant fury with which God will "smite" the people.

sword … doubled the third time—referring to the threefold calamity:—(1) The taking of Zedekiah (to whom the "rod," or scepter, may refer); (2) the taking of the city; (3) the removal of all those who remained with Gedaliah. "Doubled" means "multiplied" or "repeated." The stroke shall be doubled and even trebled.

of the slain—that is, by which many are slain. As the Hebrew is singular, Fairbairn makes it refer to the king, "the sword of the great one that is slain," or "pierced through."

entereth … privy chambers—(Jer 9:21). The sword shall overtake them, not merely in the open battlefield, but in the chambers whither they flee to hide themselves (1Ki 20:30; 22:25). Maurer translates, "which besieged them"; Fairbairn, "which penetrates to them." English Version is more literal.