Matthew Poole and continuators on 2 Samuel 10:6

6 ¶ And when the children of Ammon saw that they stank before David, the children of Ammon sent and hired the Syrians of Beth-Rehob , and the Syrians of Zoba , twenty thousand footmen, and of king Maacah a thousand men, and of Ishtob twelve thousand men.

Near Hamath, Numb. 13. 21.

Of which see 1 Sam. 14. 47. and 2 Sam. 8. 3.

i. e. Of that part of Syria which was under King Maachah: for Syria was a large Country, and there were divers Kings in the several parts of it. This part was near Gilead. See Deut. 3. 14.

Or, of the men of Tob, the Country where Iepthah dwelt, Iudg. 11. 3. Besides these, they hired others out of Aram Naharaim, or Mesopotamia, as appears from 1 Chron. 19. 6. and Psal. 60. title. And all these were forward enough to Combine against David, both to revenge their former losses and reproaches, and to give check to his growing greatness.