Numbers 22:12

22:12 But God said to Balaam, “You must not go with them; you must not curse the people, for they are blessed.”

Numbers 22:6

22:6 So now, please come and curse this nation for me, for they are too powerful for me. Perhaps I will prevail so that we may conquer them and drive them out of the land. For I know that whoever you bless is blessed, and whoever you curse is cursed.”