III. The great joy which this should occasion to the people of God. The Assyrian's fall is Jerusalem's triumph (v. 29): You shall have a song as in the night, a psalm of praise such as those sing who by night stand in the house of the Lord, and sing to his glory who gives songs in the night. It shall not be a song of vain mirth, but a sacred song, such as was sung when a holy solemnity was kept in a grave and religious manner. Our joy in the fall of the church's enemies must be a holy joy, gladness of heart, as when one goes, with a pipe (such as the sons of the prophets used when they prophesied, 1 Sam. x. 5), to the mountain of the Lord, there to celebrate the praises of the Mighty One of Israel. Nay, in every place where the divine vengeance shall pursue the Assyrians they shall not only fall unlamented, but all their neighbours shall attend their fall with tabrets and harps, pleased to see how God, in battles of shaking, such as shake them out of the world, fights with them (v. 32); for when the wicked perish there is shouting; and it is with a particular satisfaction that wise and good men see the ruin of those who, like the Assyrians, have insolently bidden defiance to God and trampled upon all mankind.