15 And when the Syrians saw that they were put to the worse before Israel, they gathered themselves together. 16 And Hadarezer sent, and brought out the Syrians that were beyond the River: and they came to Helam, with Shobach the captain of the host of Hadarezer at their head. 17 And it was told David; and he gathered all Israel together, and passed over the Jordan, and came to Helam. And the Syrians set themselves in array against David, and fought with him. 18 And the Syrians fled before Israel; and David slew of the Syrians [the men of] seven hundred chariots, and forty thousand horsemen, and smote Shobach the captain of their host, so that he died there.
Matthew Henry's Commentary on 2 Samuel 10:15-18
Commentary on 2 Samuel 10:15-19
(Read 2 Samuel 10:15-19)
Here is a new attempt of the Syrians. Even the baffled cause will make head as long as there is any life in it; the enemies of the Son of David do so. But now the promise made to Abraham, Joshua 1:4, that the borders of Israel should extend to the river Euphrates, was performed. Learn hence, that it is dangerous to help those who have God against them; for when they fall, their helpers will fall with them.