1 Kings 22:31
But the king of Syria commanded his thirty and two captains that had rule over his chariots, saying, Fight neither with small nor great, save only with the king of Israel. But the king of Syria commanded his thirty and two captains that had rule over his chariots, saying, Fight neither with small nor great, save only with the king of Israel.
The command to strike only at the king of Israel was given for the battle at Ramoth-gilead. In that engagement Ahab was hit by an arrow and died. His death fulfilled Micaiah's warning that Israel would be left without its king and that the people would return home.