Passage 10.23.14
ἐγένετο δὲ τῶν Κελτῶν στρατεία τε ἐπὶ τὴν Ἑλλάδα καὶ ἡ ἀπώλεια Ἀναξικράτους Ἀθήνῃσιν ἄρχοντος, δευτέρῳ δὲ ἔτει τῆς πέμπτης Ὀλυμπιάδος ἐπὶ εἴκοσι καὶ ἑκατόν, ἣν Λάδας Αἰγιεὺς ἐνίκα στάδιον· τῷ δὲ ἔτει τῷ ἐφεξῆς Δημοκλέους Ἀθήνῃσιν ἄρχοντος, οἱ δὲ αὖθις ἐς τὴν Ἀσίαν διαβαίνουσιν οἱ Κελτοί.
The Celtic invasion of Greece and their defeat occurred during the archonship of Anaxicrates at Athens, in the second year of the hundred and twenty-fifth Olympiad, in which Ladas of Aegium won the stadion. In the following year, during the archonship of Democles at Athens, the Celts crossed once more into Asia.