Numbers 22:34-38

So Balaam said to the angel of the Lord, “I have sinned, for I did not know that you were standing in the way against me. Now then, if it is displeasing to you, I will turn back.”

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.”