Passage 3.13.4
Κάρνειον δὲ Ἀπόλλωνα Δωριεῦσι μὲν τοῖς πᾶσι σέβεσθαι καθέστηκεν ἀπὸ Κάρνου γένος ἐξ Ἀκαρνανίας, μαντευομένου δὲ ἐξ Ἀπόλλωνος· τοῦτον γὰρ τὸν Κάρνον ἀποκτείναντος Ἱππότου τοῦ Φύλαντος ἐνέπεσεν ἐς τὸ στρατόπεδον τοῖς Δωριεῦσι μήνιμα Ἀπόλλωνος, καὶ Ἱππότης τε ἔφυγεν ἐπὶ τῷ φόνῳ καὶ Δωριεῦσιν ἀπὸ τούτου τὸν Ἀκαρνᾶνα μάντιν καθέστηκεν ἱλάσκεσθαι. ἀλλὰ γὰρ Λακεδαιμονίοις οὐχ οὗτος ὁ Οἰκέτας ἐστὶ Καρνειός, ὁ δὲ ἐν τοῦ μάντεως Κριοῦ τιμώμενος Ἀχαιῶν ἔτι ἐχόντων τὴν Σπάρτην.
It has been established that Apollo Carneius is honored by all the Dorians, deriving from Carnus, a seer from Acarnania, who received his oracle from Apollo. For when Carnus was killed by Hippotes, son of Phylas, the wrath of Apollo befell the Dorian army; Hippotes went into exile because of this murder, and from that time forward the Dorians established rites to propitiate the Acarnanian seer. However, among the Lacedaemonians, Carneius is not this prophet from Acarnania, but Oiketas, who was worshipped in the house of the seer Krios, even from the time when the Achaeans still occupied Sparta.