3 On that day I will make Jerusalem an immovable rock. All the nations will gather against it to try to move it, but they will only hurt themselves. 4 "On that day," says the Lord, "I will cause every horse to panic and every rider to lose his nerve. I will watch over the people of Judah, but I will blind all the horses of their enemies. 5 And the clans of Judah will say to themselves, 'The people of Jerusalem have found strength in the Lord of Heaven's Armies, their God.' 6 "On that day I will make the clans of Judah like a flame that sets a woodpile ablaze or like a burning torch among sheaves of grain. They will burn up all the neighboring nations right and left, while the people living in Jerusalem remain secure.
Matthew Henry's Commentary on Zechariah 12:3-6
Commentary on Zechariah 12:1-8
(Read Zechariah 12:1-8)
Here is a Divine prediction, which will be a heavy burden to all the enemies of the church. But it is for Israel; for their comfort and benefit. It is promised that God will make foolish the counsels, and weaken the courage of the enemies of the church. The exact meaning is not clear; but God often begins by calling the poor and despised; and in that day even the feeblest will resemble David, and be as eminent in courage and every thing good. Desirable indeed is it that the examples and labours of Christians should render them as fire among wood, as a torch in a sheaf, to kindle the flame of Divine love, to spread religion on the right hand and on the left.