At your rebuke, O God of Jacob, both the chariot and horse are cast into a dead sleep.
Read Chapter 76
Augustine of Hippo
7. "By Thy chiding, O God of Jacob, there have slept all men that have mounted horses" (ver. 6). Who are they that have mounted horses? They that would not be humble. To sit on horseback is no sin; but it is a sin to lift up the neck of power against God, and to deem one's self to be in some distinction. Because thou art rich, thou hast mounted; God doth chide, and thou sleepest. Great is the anger of Him chiding, great the anger. Let your Love observe the terrible thing. Chiding hath noise, the noise is wont to make men wake. So great is the force of God chiding, that he said, "By Thy chiding, O God of Jacob, there have slept all men that have mounted horses." Behold what a sleep that Pharaoh slept who mounted horses. For he was not awake in heart, because against chiding he had his heart hardened. For hardness of heart is slumber. I ask you, my brethren, how they sleep, who, while the Gospel is sounding, and the Amen, and the Hallelujah, throughout the whole world, yet will not conde...
Mounted. Hebrew, "the chariot and horse. "(Calmet)
But the riders are meant. (Berthier)
Rabsaces had boasted, that Ezechias could not find men to mount 2,000 horses, if he should give them to him, 4 Kings xviii. 23. (Calmet)
But God chastised his vain boasting. (Haydock)
While he defends his people, their enemies seem to slumber. (Worthington)