Divrey Hayamim Bais 18:29-31

Orthodox Jewish Bible

²⁹ And the Melech Yisroel said unto Yehoshaphat, I will disguise myself, and I will go to the milchamah; but put thou on thy robes. So the Melech Yisroel disguised himself; and they went to the milchamah.

³⁰ Now Melech Aram had commanded the commanders of the chariots that were with him, saying, Fight ye not with katon or gadol, only with the Melech Yisroel.

³¹ And it came to pass, when the commanders of the chariots saw Yehoshaphat, that they said, It is the Melech Yisroel. Therefore they surrounded him to fight, but Yehoshaphat cried out, and Hashem helped him; and Elohim moved them away from him.