Sforno on Numbers 22:9/ספורנו על במדבר כ״ב:ט׳

1?מי האנשים האלה עמך, who are these people with you on account of whom you went to the trouble to receive prophetic messages in order to know what to do for them?Have they really come to you to inquire about matters which will occur in the future and you want to know about the future in order to give them guidance? Or, have they stayed with you to enlist your help to pronounce curses over someone and you are now asking My permission to fulfill their request?