That thou mayest recover him - literally, “And thou shalt recover him.” The Syrian king presumes that, if there is a cure for leprosy to be had in Israel, the mode of obtaining it will be well known to his royal brother.
Matthew Henry
Concise Bible Commentary
Though the Syrians were idolaters, and oppressed God's people, yet the deliverance of which Naaman had been the means, is here ascribed to the Lord. Such is the correct language of Scripture, while those who write common history, plainly show that God is not in all their thoughts. No man's greatness, or honour, can place him our of the reach of the sorest calamities of human life: there is many a sickly, crazy body under rich and gay clothing. Every man has some but or other, something that blemishes and diminishes him, some allay to his grandeur, some damp to his joy. This little maid, though only a girl, could give an account of the famous prophet the Israelites had among them. Children should be early told of the wondrous works of God, that, wherever they go, they may talk of them. As became a good servant, she desired the health and welfare of her master, though she was a captive, a servant by force; much more should servants by choice, seek their masters' good. Servants may be blessings to the families where they are, by telling what they know of the glory of God, and the honour of his prophets. Naaman did not despise what she told, because of her meanness. It would be well if men were as sensible of the burden of sin as they are of bodily disease. And when they seek the blessings which the Lord sends in answer to the prayers of his faithful people, they will find nothing can be had, except they come as beggars for a free gift, not as lords to demand or purchase.
SDA Bible Commentary (limited)
Volume 1-7
6. Recover him. The king of Syria evidently thought that the prophet who was reputed to accomplish such miracles, was a member of a religious order under the control of the state and at the command of the king.