וַיֵּעָזְר֣וּ עֲלֵיהֶ֔ם וַיִּנָּתְנ֤וּ בְיָדָם֙ הַֽהַגְרִיאִ֔ים וְכֹ֖ל שֶׁ֣עִמָּהֶ֑ם כִּ֠י לֵאלֹהִ֤ים זָעֲקוּ֙ בַּמִּלְחָמָ֔ה וְנַעְתּ֥וֹר לָהֶ֖ם כִּי־בָ֥טְחוּ בֽוֹ׃
And they were helped against them, and the Hagrites were delivered into their hand, and all that were with them; for they cried to God in the battle, and He was entreated of them, because they put their trust in Him.
Rashi on I Chronicles
And they were assisted against them for the Lord helped them.
Rashi on I Chronicles
and the Hagarites and all who were with them other nations [that came] to their aid.
Rashi on I Chronicles
and He accepted their prayers וְנַעְתּוֹר, similar to if וַיֵּעָתֵר לוֹ accepted his prayer (Gen. 25:21).