Numeri 22:13

Observe! how this wretch trades in iniquity. Had he dealt honestly with the servants of Balak, he would have told them that the people whom their master wished him to curse, the LORD had determined to bless; and therefore, it would be the highest impiety in him to do what Balak wished him. But probably he hoped by this message to keep the embassy open, and that he might yet do what Balak wished him. See what Jude saith of him: Giuda 1:11.