Numbers 22:6-7

6Now come and put a curse on these people, because they are too powerful for me. Perhaps then I will be able to defeat them and drive them out of the land. For I know that whoever you bless is blessed, and whoever you curse is cursed.”

7The elders of Moab and Midian left, taking with them the fee for divination. When they came to Balaam, they told him what Balak had said.