Numbers 22:5-6

So he sent men to Balaam, son of Beor, at Pethor by the River in the land of the children of his people, saying to him, See, a people has come out of Egypt, covering all the face of the earth, and they have put up their tents opposite to me: Come now, in answer to my prayer, and put a curse on this people, for they are greater than I: and then I may be strong enough to overcome them and send them out of the land: for it is clear that good comes to him who has your blessing, but he on whom you put your curse is cursed.