Commentary for I Chronicles 19:16

וַיַּ֣רְא אֲרָ֗ם כִּ֣י נִגְּפוּ֮ לִפְנֵ֣י יִשְׂרָאֵל֒ וַֽיִּשְׁלְחוּ֙ מַלְאָכִ֔ים וַיּוֹצִ֣יאוּ אֶת־אֲרָ֔ם אֲשֶׁ֖ר מֵעֵ֣בֶר הַנָּהָ֑ר וְשׁוֹפַ֛ךְ שַׂר־צְבָ֥א הֲדַדְעֶ֖זֶר לִפְנֵיהֶֽם׃

And when the Arameans saw that they were put to the worse before Israel, they sent messengers, and brought out the Arameans that were beyond the River, with Shophach the captain of the host of Hadarezer at their head.

Rashi on I Chronicles