וּמֶ֣לֶךְ אֲרָ֡ם צִוָּה֩ אֶת־שָׂרֵ֨י הָרֶ֤כֶב אֲשֶׁר־לוֹ֙ לֵאמֹ֔ר לֹ֚א תִּלָּ֣חֲמ֔וּ אֶת־הַקָּטֹ֖ן אֶת־הַגָּד֑וֹל כִּ֛י אִֽם־אֶת־מֶ֥לֶךְ יִשְׂרָאֵ֖ל לְבַדּֽוֹ׃
Now the king of Aram had commanded the captains of his chariots, saying: ‘Fight neither with small nor great, save only with the king of Israel.’
Read Midrashic interpretations of II Chronicles 18:30: rabbinic exegesis from Bereshit Rabbah, Shemot Rabbah and classical Midrash sources, free.