Passage 1.23.9
ἀνδριάντων δὲ ὅσοι μετὰ τὸν ἵππον ἑστήκασιν Ἐπιχαρίνου μὲν ὁπλιτοδρομεῖν ἀσκήσαντος τὴν εἰκόνα ἐποίησε Κριτίας , Οἰνοβίῳ δὲ ἔργον ἐστὶν ἐς Θουκυδίδην τὸν Ὀλόρου χρηστόν· ψήφισμα γὰρ ἐνίκησεν Οἰνόβιος κατελθεῖν ἐς Ἀθήνας Θουκυδίδην, καί οἱ δολοφονηθέντι ὡς κατῄει μνῆμά ἐστιν οὐ πόρρω πυλῶν Μελιτίδων.
Of the statues which stand beyond the horse, Kritias fashioned the likeness of Epicharinos, who had trained himself in the race of heavy-armed men. There is also a noteworthy deed of Oinobios concerning Thucydides, the son of Oloros: for Oinobios carried a decree that allowed Thucydides to return to Athens, and having been treacherously killed as he was returning, Thucydides has a tomb situated not far from the Melitid gate.