Assyria can't save us. We won't ride on horses; Neither will we say any more to the work of our hands, 'Our gods!' For in you the fatherless finds mercy."
The meaning of this will be better understood by referring to other passages, which correspond with what is here said. God says by Isaiah, ‘On horses mount not; but ye said, We will mount: then mount,’ says he, (Isaiah 30:16.) Here is a striking intimation, that the Jews against God’s will rode and hastened to seek aids. “I see you,” he says, “to be very prompt and swift: then mount, but it shall be for the purpose of fleeing.” We see what was the design of this reproof of the Prophet; it was to show that the Jews, who ought to have remained still and quiet, fled here and there for the sake of seeking assistance. So also in this place, when they would show the fruit of their repentance, they say, “We will not hereafter mount a horse, for the Lord, who promises to be our aid, is not to be sought as one far off: we will not then any more fatigue ourselves in vain.” It seems to me that this is what is meant by the Prophet. 