On 7/23/16, Rabbi Kerry Baker led Torah study on Parashat Balak at Congregation Beth Israel in Austin, Texas, focusing on this passage. Here’s the entire audio file from the session: http://everybodyneedsarabbi.com/rbkaudio/Baker07232016.mp3

“Balaak, the son of Zippor, who was king of Moab at that time, sent messengers to Bilaam, the son of Beor in Pethor, which is by the Euphrates, in the land of his kinfolk, to invite him saying, ‘There is a people that came out of Egypt; it hides the earth from view, and it is settled next to me. Come then and put a curse on this people for me, since they are too numerous for me; perhaps I can thus defeat them and drive them out of the land. For I know that he whom you bless is blessed indeed, and he whom you curse is cursed!”’ —Numbers 22:4-6

And here’s the handout for the study, giving ancient and modern views on this parashat:
http://everybodyneedsarabbi.com/rkbpdf/Balak001.pdf