וּמֶ֣לֶךְ אֲרָ֡ם צִוָּ֣ה אֶת־שָׂרֵי֩ הָרֶ֨כֶב אֲשֶׁר־ל֜וֹ שְׁלֹשִׁ֤ים וּשְׁנַ֙יִם֙ לֵאמֹ֔ר לֹ֚א תִּלָּ֣חֲמ֔וּ אֶת־קָטֹ֖ן וְאֶת־גָּד֑וֹל כִּ֛י אִֽם־אֶת־מֶ֥לֶךְ יִשְׂרָאֵ֖ל לְבַדּֽוֹ׃
Now the king of Aram had commanded the thirty and two captains of his chariots, saying: ‘Fight neither with small nor great, save only with the king of Israel.’
Rashi
These have no masters. You alone will die in the war, as the matter is stated below, “Do not battle the small or the great, but only with the king of Yisroel himself.”7Below v. 31. Even though it was stated, “and your people instead of his people,”8Above 20:42. the drop of blood that came out of the righteous man, Michoyhu, whose friend struck him, striking and wounding him, was an atonement for all Yisroel. So it is explained in the [Midrash] Aggadah.9Talmud Yerushalmi Maseches Sanhedrin 11:5.