Numbers 22:13-17

And Balaam rose up in the morning, and said unto the princes of Balak, Get you into your land: for the LORD refuseth to give me leave to go with you.

And the princes of Moab rose up, and they went unto Balak, and said, Balaam refuseth to come with us.

And Balak sent yet again princes, more, and more honourable than they.

And they came to Balaam, and said to him, Thus saith Balak the son of Zippor, Let nothing, I pray thee, hinder thee from coming unto me:

For I will promote thee unto very great honour, and I will do whatsoever thou sayest unto me: come therefore, I pray thee, curse me this people.