Numbers 23:5, 8, 11

Then the LORD put a message in Balaam’s mouth and said, “Return to Balak and say what I tell you.”

How can I curse someone God has not cursed? How can I denounce someone the  LORD has not denounced?

“What have you done to me? ” Balak asked Balaam. “I brought you to curse my enemies, but look, you have only blessed them! ”