Passage 3.12.5
προϊόντων δὲ κατὰ τὴν Ἀφεταΐδα ἡρῷά ἐστιν Ἴοπός τε κατὰ Λέλεγα ἢ Μύλητα γενέσθαι δοκοῦντος καὶ Ἀμφιαράου τοῦ Ὀικλέους· τοῦτο δὲ τοὺς Τυνδάρεω παῖδας νομίζουσιν ἅτε ἀνεψιῷ τῷ Ἀμφιαράῳ ποιῆσαι· καὶ αὐτοῦ Λέλεγός ἐστιν ἡρῷον, τούτων δὲ οὐ πόρρω τέμενος Ποσειδῶνος Ταιναρίου ---Ταινάριον δὲ ἐπονομάζουσιν---
As one advances along the Afetaïd region, there are hero-shrines to Iops, who is said to have been born from Lelex or Myles, and also to Amphiaraus, son of Oïkles. It is believed that the sons of Tyndareus established this shrine to Amphiaraus because he was their cousin. There is also a shrine there for Lelex himself. Not far from these stands a precinct sacred to Poseidon Tainarios, who is called Tainarion.