Passage 8.36.8
ἐν δὲ τοῖς κατὰ μεσημβρίαν τοῦ ὄρους Σουμητία ᾤκιστο. ἐν τούτῳ δέ εἰσι τῷ ὄρει καὶ αἱ καλούμεναι Τρίοδοι, καὶ τὰ ὀστᾶ Ἀρκάδος τοῦ Καλλιστοῦς ἀνείλοντο ἐντεῦθεν κατὰ τὸ ἐκ Δελφῶν μάντευμα οἱ Μαντινεῖς. λείπεται δὲ καὶ αὐτῆς ἔτι ἐρείπια Μαινάλου, ναοῦ τε σημεῖα Ἀθηνᾶς καὶ στάδιον ἐς ἀθλητῶν ἀγῶνα καὶ τὸ ἕτερον αὐτῶν ἐς ἵππων δρόμον· τὸ δὲ ὄρος τὸ Μαινάλιον ἱερὸν μάλιστα εἶναι Πανὸς νομίζουσιν, ὥστε οἱ περὶ αὐτὸ καὶ ἐπακροᾶσθαι συρίζοντος τοῦ Πανὸς λέγουσι.
On the southern slopes of the mountain was built a settlement named Soumetia. In this same mountain are also the places called Triodoi ("Three Roads"), from where the Mantineans, following an oracle from Delphi, brought back the bones of Arkas, son of Callisto. There still remain ruins of Maenalus itself, traces of a temple dedicated to Athena, a stadium built for athletic contests, and another intended for horse races. The mountain of Maenalus is considered especially sacred to Pan, and those who dwell around it say they even hear Pan playing his reed pipes.