Ben-hadad is now as humble as Ahab had been a year before 1 Kings 20:9. He professes himself the mere "slave" of his conqueror.

Thy servant Ben-hadad - See the vicissitude of human affairs! A little before he was the haughtiest of all tyrants, and Ahab calls him his lord; now, so much is he humbled, that he will be glad to be reputed Ahab's slave!

So they girded sackcloth on their loins, and put ropes on their heads,.... Signifying they came to surrender themselves to him as his captives and prisoners, and he might do with them as seemed good to him, hang them up if he pleased, for which they brought ropes with them, as a token that they deserved it, see Isaiah 20:2,

and came to the king of Israel, and said, thy servant Benhadad saith, I pray thee let me live: he that a little while ago insolently demanded his wives, and children, and silver, and gold, as his property, now is his humble servant, and begs, not for his crown and kingdom, but for his life:

and he said, is he yet alive? he is my brother; which was intimating at once, that not only they might expect he would spare his life, who seemed to be so glad that he was alive, but that he would show him more favour, having a great affection for him as his brother; this was a very foolish expression from a king in his circumstances, with respect to one who had given him so much trouble and distress, and had behaved with so much haughtiness and contempt towards him.

So they girded sackcloth on their loins, and put ropes on their heads, and came to the king of Israel, and said, Thy servant Benhadad saith, I pray thee, let me live. And he said, Is he yet alive? he is my brother.

20:32 My brother - I do not only pardon him, but honour and love him as my brother. What a change is here! From the height of prosperity, to the depth of distress. See the uncertainty of human affairs! Such turns are they subject to, that the spoke of the wheel which is uppermost now, may soon be the lowest of all.

32-34. put ropes on their heads-Captives were dragged by ropes round their necks in companies, as is depicted on the monuments of Egypt. Their voluntary attitude and language of submission flattered the pride of Ahab, who, little concerned about the dishonor done to the God of Israel by the Syrian king, and thinking of nothing but victory, paraded his clemency, called the vanquished king "his brother," invited him to sit in the royal chariot, and dismissed him with a covenant of peace.

20:31-43 This encouragement sinners have to repent and humble themselves before God; Have we not heard, that the God of Israel is a merciful God? Have we not found him so? That is gospel repentance, which flows from an apprehension of the mercy of God, in Christ; there is forgiveness with him. What a change is here! The most haughty in prosperity often are most abject in adversity; an evil spirit will thus affect a man in both these conditions. There are those on whom, like Ahab, success is ill bestowed; they know not how to serve either God or their generation, or even their own true interests with their prosperity: Let favour be showed to the wicked, yet will he not learn righteousness. The prophet designed to reprove Ahab by a parable. If a good prophet were punished for sparing his friend and God's when God said, Smite, of much sorer punishment should a wicked king be thought worthy, who spared his enemy and God's, when God said, Smite. Ahab went to his house, heavy and displeased, not truly penitent, or seeking to undo what he had done amiss; every way out of humour, notwithstanding his victory. Alas! many that hear the glad tidings of Christ, are busy and there till the day of salvation is gone.