Verse 29. Humbleth himself - His humiliation was real, though not lasting, and accordingly pleasing to God. This discovers the great goodness of God, and his readiness to shew mercy. It teaches us to take notice of that which is good, even in the worst of men. It gives a reason why wicked persons often prosper: God rewards what little good is in them. And it encourages true penitents. If even Ahab goes to his house reprieved, doubtless they shall go to their houses justified.