At thy rebuke, O God of Jacob, both the chariot and horse are cast into a dead sleep. At thy rebuke - It was not by any human means that this immense army was overthrown; it was by the power of God alone. Not only infantry was destroyed, but the cavalry also.
The chariot and horse - That is, the chariot horses, as well as the men, were
Cast into a dead sleep - Were all suffocated in the same night. On the destruction of this mighty host, the reader is requested to refer to the notes on 2 Kings 19.