Bamidbar 23:28

ראש הפעור THE TOP OF PEOR — Balak was a great soothsayer and he foresaw that they would once be punished on account of Peor, but he knew not by what. He said: Perhaps the curse will fall upon them from there (be effective against them if pronounced there). So, too, all astrologers: they see something that will once happen but they know not exactly what they see (cf. Sotah 12b).

וַיִּקַּ֥ח בָּלָ֖ק אֶת־בִּלְעָ֑ם רֹ֣אשׁ הַפְּע֔וֹר הַנִּשְׁקָ֖ף עַל־פְּנֵ֥י הַיְשִׁימֹֽן׃

And Balaq brought Bil῾am to the top of Pe῾or, that looks out towards the desert.