Numbers 23:18-20

And Balaam took up his discourse and said, “Rise, Balak, and hear; give ear to me, O son of Zippor: God is not man, that he should lie, or a son of man, that he should change his mind. Has he said, and will he not do it? Or has he spoken, and will he not fulfill it? Behold, I received a command to bless: he has blessed, and I cannot revoke it.