2 Kings 6:21-23

When the king of Israel saw them, he shouted to Elisha, “My father, should I kill them? Should I kill them?” “Of course not!” Elisha replied. “Do we kill prisoners of war? Give them food and drink and send them home again to their master.” So the king made a great feast for them and then sent them home to their master. After that, the Aramean raiders stayed away from the land of Israel.