What did Balaam do when Balak brought him to curse Israel?

Answer: He blessed Israel

Balak complained that he had summoned Balaam to curse his enemies, but Balaam blessed them three times.

“Then Balak said to Balaam, “What have you done to me? I brought you here to curse my enemies, and behold, you have only blessed them!””— Numbers 23:11 (BSB)