Numbers 23:18-20

And he took up his parable, and said, Rise up, Balak, and hear; Hearken unto me, thou son of Zippor: God is not a man, that he should lie, Neither the son of man, that he should repent: Hath he said, and will he not do it? Or hath he spoken, and will he not make it good? Behold, I have received commandment to bless: And he hath blessed, and I cannot reverse it.