Moses
Numbers 22:3ESV·traditional attribution

And Moab was in great dread of the people, because they were many. Moab was overcome with fear of the people of Israel.

Matthew Henry Presbyterian @wholebiblehenry

The children of Israel have at length finished their wanderings in the wilderness, out of which they went up (Num 21:18), and are now encamped in the plains of Moab near Jordan, where they continued till they passed through Jordan under Joshua, after the death of Moses. Now we have here, I. The fright which the Moabites were in upon the approach of Israel, Num 22:2-4.

Commenting on Numbers 22:1-14

John Gill Reformed Baptist @doctorgill

And Moab said unto the elders of Midian,.... Whom the king of Moab sent for to consult with what to do in the present case, for the good and safety of both people; for, according to the Targum of Jonathan, they were one people and one kingdom unto this time, at least had been confederates, by what is said Gen 36:35 though Jarchi thinks there...

Keil & Delitzsch Lutheran @keilanddelitzsch

Num 22:2-21 The rapid defeat of the two mighty kings of the Amorites filled the Moabites with such alarm at the irresistible might of Israel, that Balak their king, with the princes of Midian, sought to bring the powers of heathen magic to bear against the nation of God; and to this end he sent messengers with presents to Balaam, the celebrated soothsayer, in Mesopotamia...

Commenting on Numbers 22:2-21