Numbers 22:15-22

Then Balak again sent leaders, more numerous and [men who were] more distinguished than the first ones. They came to Balaam, and said to him, “Thus says Balak the son of Zippor, ‘I beg you, let nothing hinder you from coming to me. For I will give you a very great honor and I will do whatever you tell me; so please come, curse these people [of Israel] for me.’ ” Balaam answered the servants of Balak, “Even if Balak were to give me his house full of silver and gold, I could not do anything, either small or great, contrary to the command of the LORD my God. Now please, you also stay here tonight, and I will find out what else the LORD will say to me.” God came to Balaam at night and said to him, “If the men have come to call you, get up and go with them, but you shall still do only what I tell you.” So Balaam got up in the morning and saddled his donkey and went with the leaders of Moab. But God’s anger was kindled because he was going, and the Angel of the LORD took His stand in the way as an adversary against him. Now he was riding on his donkey, and his two servants were with him.