Moses
Numbers 22:7ESV·traditional attribution

So the elders of Moab and the elders of Midian departed with the fees for divination in their hand. And they came to Balaam and gave him Balak’s message.

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 he said unto them, lodge here this night,.... Which shows that he was at once inclined to do their business for them, and would readily engage in it if he could be permitted; and it looks as if it was in the night season that he got knowledge of things, either in dreams, or by familiar spirits, or by consulting the stars, or other...

Jamieson-Fausset-Brown Reformed @jfbcommentary

the elders of Moab and . . . of Midian departed with the rewards of divination--like the fee of a fortune teller, and being a royal present, it would be something handsome.