Numbers 22:7, 17-18

So the elders of Moab and of Midian departed with fees for divination (foretelling) in hand; and they came to Balaam and told him the words of Balak.

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.