Passage 10.13.8
λέγεται δὲ ὑπὸ Δελφῶν Ἡρακλεῖ τῷ Ἀμφιτρύωνος ἐλθόντι ἐπὶ τὸ χρηστήριον τὴν πρόμαντιν Ξενόκλειαν οὐκ ἐθελῆσαί οἱ χρᾶν διὰ τοῦ Ἰφίτου τὸν φόνον· τὸν δὲ ἀράμενον τὸν τρίποδα ἐκ τοῦ ναοῦ φέρειν ἔξω, εἰπεῖν τε δὴ τὴν πρόμαντιν· ἄλλος ἄρʼ Ἡρακλέης Τιρύνθιος, οὐχὶ Κανωβεύς· πρότερον γὰρ ἔτι ὁ Αἰγύπτιος Ἡρακλῆς ἀφίκετο ἐς Δελφούς. τότε δὲ ὁ Ἀμφιτρύωνος τόν τε τρίποδα ἀποδίδωσι τῷ Ἀπόλλωνι καὶ παρὰ τῆς Ξενοκλείας ὁπόσα ἐδεῖτο ἐδιδάχθη. παραδεξάμενοι δὲ οἱ ποιηταὶ τὸν λόγον μάχην Ἡρακλέους πρὸς Ἀπόλλωνα ὑπὲρ τρίποδος ᾄδουσιν.
It is said by the Delphians that when Heracles, the son of Amphitryon, came to consult the oracle, Xenocleia, the priestess, refused to give him an oracle on account of the murder of Iphitus. Heracles then seized the tripod from the sanctuary and began carrying it outside, upon which the priestess declared: "Then indeed there is another Heracles, the Tirynthian, not the Canopian," for the Egyptian Heracles had come to Delphi earlier. Thereupon, Amphitryon's son returned the tripod to Apollo, and Xenocleia gave him the responses he wished for. Poets, adopting this tale, sing about the combat between Heracles and Apollo for the tripod.