Passage 10.7.5
ἔθεσαν δὲ καὶ ἆθλα τότε ἀθληταῖς πρῶτον, τά τε ἐν Ὀλυμπίᾳ πλὴν τεθρίππου καὶ αὐτοὶ νομοθετήσαντες δολίχου καὶ διαύλου παισὶν εἶναι δρόμον. δευτέρᾳ δὲ πυθιάδι οὐκ ἐπὶ ἄθλοις ἐκάλεσαν ἔτι ἀγωνίζεσθαι, στεφανίτην δὲ τὸν ἀγῶνα ἀπὸ τούτου κατεστήσαντο· καὶ αὐλῳδίαν τό τε κατέλυσαν, καταγνόντες οὐκ εἶναι τὸ ἄκουσμα εὔφημον· ἡ γὰρ αὐλῳδία μέλη τε ἦν αὐλῶν τὰ σκυθρωπότατα καὶ ἐλεγεῖα θρῆνοι προσᾳδόμενα τοῖς αὐλοῖς.
Then for the first time they also established contests for athletes, including the same events held at Olympia, except for the four-horse chariot race; and they themselves added a long-distance race (dolichos) as well as a double-length stadium race (diaulos) for boys. But at the second Pythiad they no longer called upon competitors to compete for prizes, but instead established the contest thenceforth as one for crowns of victory. They also abolished the flute-song (auloidia), judging that its sound was not well-suited for sacred festivity. For flute-singing involved the most mournful tunes of the flute, as well as elegiac verses sung as laments accompanied by flutes.