18 And when the Syrians came down against him, Elisha prayed to the Lord and said, "Please strike this people with blindness." So he struck them with blindness in accordance with the prayer of Elisha. 19 And Elisha said to them, "This is not the way, and this is not the city. Follow me, and I will bring you to the man whom you seek." And he led them to Samaria. 20 As soon as they entered Samaria, Elisha said, "O Lord, open the eyes of these men, that they may see." So the Lord opened their eyes and they saw, and behold, they were in the midst of Samaria. 21 As soon as the king of Israel saw them, he said to Elisha, "My father, shall I strike them down? Shall I strike them down?" 22 He answered, "You shall not strike them down. Would you strike down those whom you have taken captive with your sword and with your bow? Set bread and water before them, that they may eat and drink and go to their master." 23 So he prepared for them a great feast, and when they had eaten and drunk, he sent them away, and they went to their master. And the Syrians did not come again on raids into the land of Israel.
Matthew Henry's Commentary on 2 Kings 6:18-23
Commentary on 2 Kings 6:13-23
(Read 2 Kings 6:13-23)
What Elisha said to his servant is spoken to all the faithful servants of God, when without are fightings, and within are fears. Fear not, with that fear which has torment and amazement; for they that are with us, to protect us, are more than they that are against us, to destroy us. The eyes of his body were open, and with them he saw the danger. Lord, open the eyes of our faith, that with them we may see thy protecting hand. The clearer sight we have of the sovereignty and power of Heaven, the less we shall fear the troubles of earth. Satan, the god of this world, blinds men's eyes, and so deludes them unto their own ruin; but when God enlightens their eyes, they see themselves in the midst of their enemies, captives to Satan, and in danger of hell, though, before, they thought their condition good. When Elisha had the Syrians at his mercy, he made it appear that he was influenced by Divine goodness as well as Divine power. Let us not be overcome of evil, but overcome evil with good. The Syrians saw it was to no purpose to try to assault so great and so good a man.