Passage 9.18.6
τῇ δὲ Οἰδιποδίᾳ κρήνῃ τὸ ὄνομα ἐγένετο, ὅτι ἐς αὐτὴν τὸ αἷμα ἐνίψατο Οἰδίπους τοῦ πατρῴου φόνου. πρὸς δὲ τῇ πηγῇ τάφος ἐστὶν Ἀσφοδίκου· καὶ ὁ Ἀσφόδικος οὗτος ἀπέκτεινεν ἐν τῇ μάχῃ τῇ πρὸς Ἀργείους Παρθενοπαῖον τὸν Ταλαοῦ, καθὰ οἱ Θηβαῖοι λέγουσιν, ἐπεὶ τά γε ἐν Θηβαΐδι ἔπη τὰ ἐς τὴν Παρθενοπαίου τελευτὴν Περικλύμενον τὸν ἀνελόντα φησὶν εἶναι.
The spring Oedipodia received its name because there Oedipus washed away the blood of the murder of his father. Near the spring is the tomb of Asphodicus. This Asphodicus killed Parthenopaeus son of Talaus in the battle against the Argives, as the Thebans claim; however, in the poems of the Thebaid, it is said that Periclymenus was the one who slew Parthenopaeus.