Passage 8.38.11
τῆς Λυκοσούρας δέ ἐστιν ἐν δεξιᾷ Νόμια ὄρη καλούμενα, καὶ Πανός τε ἱερὸν ἐν αὐτοῖς ἐστι Νομίου καὶ τὸ χωρίον ὀνομάζουσι Μέλπειαν, τὸ ἀπὸ τῆς σύριγγος μέλος ἐνταῦθα Πανὸς εὑρεθῆναι λέγοντες. κληθῆναι δὲ τὰ ὄρη Νόμια προχειρότατον μέν ἐστιν εἰκάζειν ἐπὶ τοῦ Πανὸς ταῖς νομαῖς, αὐτοὶ δὲ οἱ Ἀρκάδες νύμφης εἶναί φασιν ὄνομα.
To the right of Lycosura are mountains called Nomia, and there is a sanctuary there dedicated to Pan Nomios; the place itself they name Melpeia, for they say it was there that the melody of Pan's pipe was first discovered. That the mountains were named Nomia after Pan's pasturings is indeed the simplest conjecture, but the Arcadians themselves assert that the name comes from a nymph.