Numbers 22:15-22

Then Balak sent other officials, more numerous and more distinguished than the first. They came to Balaam and said: “This is what Balak son of Zippor says: Do not let anything keep you from coming to me, because I will reward you handsomely and do whatever you say. Come and put a curse on these people for me.” But Balaam answered them, “Even if Balak gave me all the silver and gold in his palace, I could not do anything great or small to go beyond the command of the LORD my God. Now spend the night here so that I can find out what else the LORD will tell me.” That night God came to Balaam and said, “Since these men have come to summon you, go with them, but do only what I tell you.” Balaam got up in the morning, saddled his donkey and went with the Moabite officials. But God was very angry when he went, and the angel of the LORD stood in the road to oppose him. Balaam was riding on his donkey, and his two servants were with him.