3. God graciously lets fall his controversy, in answer to the prophet's prayer, once and again (v. 3): The Lord repented for this. He did not change his mind, for he is one mind and who can turn him? But he changed his way, took another course, and determined to deal in mercy and not in wrath. He said, It shall not be. And again (v. 6), This also shall not be. The caterpillars were countermanded, were remanded; a stop was put to the progress of the fire, and thus a reprieve was granted. See the power of prayer, of effectual fervent prayer, and how much it avails, what great things it prevails for. A stop has many a time been put to a judgment by making supplication to the Judge. This was not the first time that Israel's life was begged, and so saved. See what a blessing praying people, praying prophets, are to a land, and therefore how highly they ought to be valued. Ruin would many a time have broken in if they had not stood in the breach, and made good the pass. See how ready, how swift, God is to show mercy, how he waits to be gracious. Amos moves for a reprieve, and obtains it, because God inclines to grant it and looks about to see if there be any that will intercede for it, Isa. lix. 16. Nor are former reprieves objected against further instances of mercy, but are rather encouragements to pray and hope for them. This also shall not be, any more than that. It is the glory of God that he multiplies to pardon, that he spares, and forgives, to more than seventy times seven times.