Passage 8.24.7
Προμάχου δὲ καὶ Ἐχέφρονος τῶν Ψωφῖδος οὐκ ἐπιφανῆ κατʼ ἐμὲ ἔτι ἦν τὰ ἡρῷα. τέθαπται δὲ καὶ Ἀλκμαίων ἐν Ψωφῖδι ὁ Ἀμφιαράου, καί οἱ τὸ μνῆμά ἐστιν οἴκημα οὔτε μεγέθει μέγα οὔτε ἄλλως κεκοσμημένον· περὶ δὲ αὐτὸ κυπάρισσοι πεφύκασιν ἐς τοσοῦτον ὕψος ἀνήκουσαι, ὥστε καὶ τὸ ὄρος τὸ πρὸς τῇ Ψωφῖδι κατεσκιάζετο ὑπʼ αὐτῶν. ταύτας οὐκ ἐθέλουσιν ἐκκόπτειν ἱερὰς τοῦ Ἀλκμαίωνος νομίζοντες· καλοῦνται δὲ ὑπὸ τῶν ἐπιχωρίων παρθένοι.
At my time, the hero-shrines of Promachus and Echephron at Psophis were no longer remarkable. Alcmaeon, the son of Amphiaraus, is also buried in Psophis, and his monument is a building neither great in size nor decorated in any other way. However, around it have grown cypress trees that have reached such a great height that even the mountain by Psophis is overshadowed by them. The locals refuse to cut them down, regarding the trees as sacred to Alcmaeon. They call these cypresses "virgins."