(6.) The river of Kishon fought against their enemies. It swept away multitudes of those that hoped to make their escape through it, v. 21. Ordinarily, it was but a shallow river, and, being in their own country, we may suppose they well knew its fords and safest passages, and yet now, probably by the great rain that fell, it was so swollen, and the stream so deep and strong, that those who attempted to pass it were drowned, being feeble and faint, and unable to make their way through it. And then were the horse-hoofs broken by means of the plungings. So it is in the margin, v. 22. The river of Kishon is called that ancient river because described or celebrated by ancient historians or poets, or rather because it was designed of old, in the counsel of God, to serve his purposes against Sisera at this time, and did so, as if it had been made on purpose; thus the water of the old pool God is said to have fashioned long ago for that use to which it was put, Isa. xxii. 11.