Numbers 23:5 KJV

And the Lord put a word in Balaam’s mouth, and said, Return unto Balak, and thus thou shalt speak.
Numbers 23:5, King James Version

In context

4 And God met Balaam: and he said unto him, I have prepared seven altars, and I have offered upon every altar a bullock and a ram.

5 And the Lord put a word in Balaam’s mouth, and said, Return unto Balak, and thus thou shalt speak.

6 And he returned unto him, and, lo, he stood by his burnt sacrifice, he, and all the princes of Moab.