Numbers 23:18-20

Then he took up his oracle and said: “Rise up, Balak, and hear! Listen to me, son of Zippor! “God is not a man, that He should lie, Nor a son of man, that He should repent. Has He said, and will He not do? Or has He spoken, and will He not make it good? Behold, I have received a command to bless; He has blessed, and I cannot reverse it.