1 Kings 22:29-33

29So King Ahab of Israel and King Jehoshaphat of Judah went to attack Ramoth Gilead.

30King Ahab said to Jehoshaphat, ‘When we go into the battle, I will wear ordinary clothes. People will not recognize me as the king. But you should wear your royal clothes.’ So the king of Israel went into the battle as if he was an ordinary soldier.

31The king of Syria had said to his 32 chariot officers, ‘Only fight the king of Israel. Do not fight against anyone else, whoever they are.’

32The chariot officers saw King Jehoshaphat in his royal clothes. They thought, ‘Surely that man is the king of Israel.’ So they turned towards him to attack him. When King Jehoshaphat saw them, he shouted out.

33Then the chariot officers realized that he was not the king of Israel. So they did not chase him any more.