Moses
Numbers 23:2ESV·traditional attribution

Balak did as Balaam had said. And Balak and Balaam offered on each altar a bull and a ram.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. Great preparation made for the cursing of Israel. That which was aimed at was to engage the God of Israel to forsake them, and either to be on Moab's side or to stand neuter. O the sottishness of superstition, to imagine that God will be at men's beck!

Commenting on Numbers 23:1-12

John Gill Reformed Baptist @doctorgill

And Balak did as Balaam had spoken,.... Ordered seven altars to be built, and prepared seven bullocks and rams for sacrifice: and Balak and Balsam offered on every altar a bullock and a ram; both seem to be concerned in offering the sacrifices; Balak, though a king, it being usual for kings to be priests also, as Melchizedek was, and Balaam as a prophet; and...

Geneva Bible Notes Reformed @genevanotes

And Balak did as Balaam had spoken; and (a) Balak and Balaam offered on [every] altar a bullock and a ram. (a) For among the Gentiles the kings often used to sacrifice, as did the priests.