Numbers 22:12 (BSB)

But God said to Balaam, “Do not go with them. You are not to curse this people, for they are blessed.”

From Numbers 22. Also in the ESV.

Commentary on Numbers 22:12

• John Calvin (Reformed), Calvin's Commentaries on Numbers 22:12: 12. Thou shalt not go with them. If there were any room for doubt, God peremptorily removes it, and confirms the prohibition; because it was unlawful to curse, those whom He had blessed. For nothing more is permitted to prophets than that they should be the witnesses, or ambassadors (internuntii,) or heralds of the grace which God freely deigns to bestow at His own pleasure upon whom He will.
• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Numbers 22:1-14: 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.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Numbers 22:12: And the princes of Moab rose up,.... And the princes of Midian also, immediately, without entering into a parley with him, to persuade him to go with them; perceiving by his answer that it would be to no purpose, and that he was determined to do as the Lord directed him: and they went unto Balak, and said, Balaam refuseth to come with us; as...
• Geneva Bible Notes (Reformed), Geneva Bible Study Notes on Numbers 22:12: And God said unto Balaam, Thou shalt not go with them; thou shalt not curse the people: for they [are] blessed. (f) He warned him by a dream, that he should not consent to the kings wicked request.