Zechariah 12:9

And it shall come to pass in that day, [that] I will seek to destroy all the nations that come against Jerusalem.

Ver. 9. I will seek to destroy] I will make inquisition and diligent scrutiny; I will draw them out of their lurking places to execution; as Saul went to seek David upon the rocks of the wild goats, 1 Samuel 24:2; those high, steep, and craggy rocks, which could not but be very tedious both to himself and to his soldiers to march in; but he was set upon it, and would leave no place unsearched. See his charge to the Ziphites to take knowledge of all the lurking holes where be hid himself, and to bring him word that he might seek him through all the thousands of Judah, 1 Samuel 23:23. The Lord need not do so to find out his enemies; for in him they live, move, and subsist, Colossians 1:17, they are ever under his view, and within his reach. He sitteth upon the circle of the earth, Isaiah 40:22, and can easily shake them out of it, as by a canvas. Yea, he sits in the height of heaven, and wherein they deal proudly, he is above them, Exodus 18:11, disclosing their cabinet counsels, as he did Benhadad's, and blasting their designs.

To destroy all nations] God stands not upon multitudes; he takes not the tenth man, but destroys all nations, be they never so many of them that come against Jerusalem, that oppose or affront his people, either with their virulent tongues or violent hands. When a rabble of rebels shall set themselves against the Lord, and against his Christ, his mystical Christ, the Church, he will utterly destroy them; the word signifieth he will destroy them, ut nihil reliquum maneat, that there shall be no remainder of them. Woe, therefore, to the Church's enemies; for their destruction ever goes with the saints' salvation, Php 1:28-29 Isa 8:9 Proverbs 11:8. God's jealousy, Zechariah 1:14, and justice, 2 Thessalonians 1:6, will effect it surely, severely, suddenly.