And he sent messengers to Bilam the son of Beor, to Pesorah, which is by the river of the land of the children of his people, to call him, saying: Behold, a people has come out of Egypt; behold, they cover the eye of the land, and they are settled opposite me.
Torah Temimah: Sanhedrin 105a — name-derasha on Bilam and Beor.
English: It was taught: Bilam — without a people; alternatively, Bilam — who consumed a people. Son of Beor — who came upon Beor.
Name-derasha (wordplay on personal names).
The name itself marks him as one who stands apart from any people and as one who destroys peoples; Beor is read as a charge of moral corruption.