1 Kings 20:33

Now the men did diligently observe whether any thing would come from him, and did hastily catch it: and they said, Thy brother Ben–hadad. Then he said, Go ye, bring him. Then Ben–hadad came forth to him; and he caused him to come up into the chariot.

Cross-reference

In 1 Kings 22:31, Ben-Hadad later commands his commanders to target only Ahab—directly contrasting Ahab's mercy here.

In 2 Chronicles 18:30, the same battle command targets Ahab—contrasting his earlier sparing of Ben-Hadad.