3. The ground of the controversy God has with the Egyptians; it is because they have cheated his people. They encouraged them to expect relief and assistance from them when they were in distress, but failed them (v. 6, 7): Because they have been a staff of reed to the house of Israel. They pretended to be a staff for them to lean upon, but, when any stress was laid upon them, they were either weak and could not or treacherous and would not do that for them which was expected. They broke under them, to their great disappointment and amazement, so that they rent their shoulder and made all their loins to be at a stand. The king of Egypt, it is probable, had encouraged Zedekiah to break his league with the king of Babylon, with a promise that he would stand by him, which, when he failed to do, to any purpose, it could not but put them into a great consternation. God had told them, long since, that the Egyptians were broken reeds, Isa. xxx. 6, 7. Rabshakeh had told them so, Isa. xxxvi. 6. And now they found it so. It was indeed the folly of Israel to trust them, and they were well enough served when they were deceived in them. God was righteous in suffering them to be so. But that is no excuse at all for the Egyptians' falsehood and treachery, nor shall it secure them from the judgments of that God who is and will be the avenger of all such wrongs. It is a great sin, and very provoking to God, as well as unjust, ungrateful, and very dishonourable and unkind, to put a cheat upon those that put a confidence in us.