Then the Lord placed the word in his mouth, and he said: "Return to Balak, and you shall say this.
Other versions
King James Version
And the LORD put a word in Balaam's mouth, and said, Return unto Balak, and thus thou shalt speak.English Standard Version
And the LORD put a word in Balaam's mouth and said, "Return to Balak, and thus you shall speak."New International Version
The LORD put a message in Balaam's mouth and said, "Go back to Balak and give him this message."