Numbers 23:16-20

So the LORD came to Balaam and told him what to say. Then he said, “Go back to Balak and say such and such.” So Balaam went to Balak, where he and the leaders of Moab were standing beside his burnt offering. Balak asked him, “What did the LORD say?” Then Balaam gave this message: “Stand up, Balak, and listen. Hear me, son of Zippor. God is not a human being, and he will not lie. He is not a human, and he does not change his mind. What he says he will do, he does. What he promises, he makes come true. He told me to bless them, so I cannot change the blessing.