Passage 8.52.5
εἶναι δὲ ἁπάντων Ἑλλήνων καὶ Λεωσθένην τίθεμαι καὶ Ἄρατον εὐεργέτας· ὁ μέν γε τὸ Ἑλλήνων μισθοφορικὸν τὸ καὶ ἐν Πέρσαις περὶ πέντε που μυριάδας ἐπὶ θάλασσαν καταβάντας ναυσὶν ἐς τὴν Ἑλλάδα ἀνέσωσε καὶ ἄκοντος Ἀλεξάνδρου· τὰ δὲ ἐς Ἄρατον ἐδήλωσε δή μοι τοῦ λόγου τὰ ἐς Σικυωνίους.
Among all Greeks, I regard both Leosthenes and Aratus as benefactors. The former succeeded in bringing safely back to Greece by ship the Greek mercenaries—about fifty thousand men—who had gone down to the sea in the Persian service, and did so even against Alexander's wishes. Regarding Aratus, my account of the Sicyonians has already made clear his achievements.