Numbers 23:16, 19-20
16 And the Lord met Balaam, and put a word in his mouth, and said, Go again unto Balak, and say thus.
19 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?
20 Behold, I have received commandment to bless: and he hath blessed; and I cannot reverse it.