Numbers 23:19 in the King James Version
God is not a man, that he should lie; neither the son of man, that he should repent: hath he said, and shall he not do it? or hath he spoken, and shall he not make it good?
Context
18 He took up his parable, and said, “Rise up, Balak, and hear! Listen to me, you son of Zippor.
19 God is not a man, that he should lie, nor a son of man, that he should repent. Has he said, and he won’t do it? Or has he spoken, and he won’t make it good?
20 Behold, I have received a command to bless. He has blessed, and I can’t reverse it.