Numbers 22:35-39

But the angel of the Lord said to Balaam, “Go with the men, but you shall speak only the word that I tell you.” So Balaam went along with the representatives of Balak.

When Balak heard that Balaam was coming, he went out to meet him at the city of Moab, which is on the Arnon border, at the extreme end of the border.

Then Balak said to Balaam, “Did I not urgently send word to you to call for you? Why did you not come to me? Am I really unable to honor you?”

So Balaam said to Balak, “Behold, I have come to you now! Am I really able to speak anything? The word that God puts in my mouth, that only shall I speak.”

And Balaam went with Balak, and they came to Kiriath-huzoth.