Moses
Numbers 22:38ESV·traditional attribution

Balaam said to Balak, “Behold, I have come to you! Have I now any power of my own to speak anything? The word that God puts in my mouth, that must I speak.”

Matthew Henry Presbyterian @wholebiblehenry

We have here the meeting between Balak and Balaam, confederate enemies to God's Israel; but here they seem to differ in their expectations of the success. 1. Balak speaks of it with confidence, not doubting but to gain his point now that Balaam had come.

Commenting on Numbers 22:36-41

John Gill Reformed Baptist @doctorgill

And it came to pass on the morrow,.... The day after the arrival of Balaam at Balak's royal seat, and after the entertainment given him, and the princes, "on the morning" (y) of that day, as the word signifies; and perhaps early in the morning, the king eager to be about business, and get the people of Israel cursed if possible as soon as could...

Jamieson-Fausset-Brown Reformed @jfbcommentary

THE JOURNEY. (Num. 22:21-41) Balaam . . . saddled his ass--probably one of the white sprightly animals which persons of rank were accustomed to ride. The saddle, as usually in the East, would be nothing more than a pad or his outer cloak.

Commenting on Numbers 22:21-41