Isaiah 31:9

There is nothing to surprise us in the fact, that the prophet returns again and again to the alliance with Egypt. After his warning had failed to prevent it, he wrestled with it in spirit, set before himself afresh the curse which would be its certain fruit, brought out and unfolded the consolation of believers that lay hidden in the curse, and did not rest till the cursed fruit, that had become a real thing, had been swallowed up by the promise, which was equally real. The situation of this fourth woe is just the same as that of the previous one. The alliance with Egypt is still in progress. "Woe to them that go down to Egypt for help, and rely upon horses, and put their trust in chariots, that there are many of them; and in horsemen, that there is a powerful multitude of them; and do not look up to the Holy One of Israel, and do not inquire for Jehovah! And yet He also is wise; thus then He brings evil, and sets not His words aside; and rises up against the house of miscreants, and against the help of evil-doers. And Egypt is man, and not God; and its horses flesh, and not spirit. And when Jehovah stretches out His hand, the helper stumbles, and he that is helped falls, and they all perish together." The expression "them that go down" (hayyōredı̄m) does not imply that the going down was taking place just then for the first time. It is the participle of qualification, just as God is called הבּרא. לעזרה with Lamed of the object, as in Isa 20:6. The horses, chariots, and horsemen here, as those of Egypt, which Diodorus calls ἱππάσιμος, on account of its soil being so suitable for cavalry (see Lepsius in Herzog's Cyclopaedia). The participle is combined in the finite verb. Instead of ועל־סוּסים, we also find the reading preferred by Norzi, of על without Vav, as in Isa…

This chapter is an abridgment of the foregoing chapter; the heads of it are much the same. Here is, I. A woe to those who, when the Assyrian army invaded them, trusted to the Egyptians, and not to God, for succour (Isa 31:1-3). II. Assurance given of the care God would take of Jerusalem in that time of danger and distress (Isa 31:4, Isa 31:5). III. A call to repentance and reformation (Isa 31:6, Isa 31:7). IV. A prediction of the fall of the Assyrian army, and the fright which the Assyrian king should thereby be put into (Isa 31:8, Isa 31:9).

31:9 princes will flee: This was fulfilled when Sennacherib fled to Nineveh after God destroyed 185,000 troops (see 37:36-37). • God himself was the fire or flame that would devour Assyria.