Numbers 23:16 (KJV)

And Balak said unto Balaam, What hast thou done unto me? I took thee to curse mine enemies, and, behold, thou hast blessed them altogether.

And he answered and said, Must I not take heed to speak that which the LORD hath put in my mouth?

And Balak said unto him, Come, I pray thee, with me unto another place, from whence thou mayest see them: thou shalt see but the utmost part of them, and shalt not see them all: and curse me them from thence.

And he brought him into the field of Zophim, to the top of Pisgah, and built seven altars, and offered a bullock and a ram on every altar.

And he said unto Balak, Stand here by thy burnt offering, while I meet the LORD yonder.

And when he came to him, behold, he stood by his burnt offering, and the princes of Moab with him. And Balak said unto him, What hath the LORD spoken?

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 shall he not do it? or hath he spoken, and shall he not make it good?

Behold, I have received commandment to bless: and he hath blessed; and I cannot reverse it.

He hath not beheld iniquity in Jacob, neither hath he seen perverseness in Israel: the LORD his God is with him, and the shout of a king is among them.