Numbers 24:10-13

10And Balak's anger was kindled against Balaam, and he struck his hands together. And Balak said to Balaam, "I called you to curse my enemies, and behold, you have blessed them these three times.

11Therefore now flee to your own place. I said, 'I will certainly honor you,' but the Lord has held you back from honor."

12And Balaam said to Balak, "Did I not tell your messengers whom you sent to me,

13'If Balak should give me his house full of silver and gold, I would not be able to go beyond the word of the Lord, to do either good or bad of my own will. What the Lord speaks, that will I speak'?