Rashi on Numbers 21:29/רש"י על במדבר כ״א:כ״ט

1אוי לך מואב WOE TO THEE, MOAB — [These are not the words of the historian but those of Balaam and Beor, for] they cursed the Moabites (as they had been hired to do) so that they should be delivered into his (Sihon’s) hands (Midrash Tanchuma, Chukat 24).

2כמוש CHEMOSH was the name of Moab’s god.

3נתן HE HATH GIVEN [HIS SONS] — The subject of the sentence is to be supplied: HE who gave HATH GIVEN HIS SONS i.e. those of Moab,

4פלטים — AS FUGITIVES — as men who flee and attempt to escape from the sword, and his daughters into captivity, etc.