And when the Syrians came down against him, Eli′sha prayed to the Lord, and said, “Strike this people, I pray thee, with blindness.” So he struck them with blindness in accordance with the prayer of Eli′sha. And Eli′sha 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 Samar′ia.
As soon as they entered Samar′ia, Eli′sha said, “O Lord, open the eyes of these men, that they may see.” So the Lord opened their eyes, and they saw; and lo, they were in the midst of Samar′ia. When the king of Israel saw them he said to Eli′sha, “My father, shall I slay them? Shall I slay them?” He answered, “You shall not slay them. Would you slay 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.” 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 came no more on raids into the land of Israel.
2 Kings 6:18-23