Passage 1.12.3
ἅτε δὲ ἄριστα ἐπιστάμενος ὡς οὐκ ἀξιόμαχος εἴη πρὸς Ῥωμαίους, παρεσκευάζετο ὡς τοὺς ἐλέφαντας ἐπαφήσων σφίσιν. ἐλέφαντας δὲ πρῶτος μὲν τῶν ἐκ τῆς Εὐρώπης Ἀλέξανδρος ἐκτήσατο Πῶρον καὶ τὴν δύναμιν καθελὼν τὴν Ἰνδῶν, ἀποθανόντος δὲ Ἀλεξάνδρου καὶ ἄλλοι τῶν βασιλέων καὶ πλείστους ἔσχεν Ἀντίγονος, Πύρρῳ δὲ ἐκ τῆς μάχης ἐγεγόνει τῆς πρὸς Δημήτριον τὰ θηρία αἰχμάλωτα· τότε δὲ ἐπιφανέντων αὐτῶν δεῖμα ἔλαβε Ῥωμαίους ἄλλο τι καὶ οὐ ζῷα εἶναι νομίσαντας.
Since he knew very well that he was no match for the Romans, he prepared to unleash elephants against them. Alexander was the first of the Europeans to acquire elephants, when he defeated Porus and subdued the Indian force. After Alexander's death, other kings also obtained elephants, with Antigonus having the greatest number. Pyrrhus himself gained these beasts as spoils from his battle with Demetrius. When they appeared at that time, the Romans were struck with terror, imagining them to be creatures of another kind and not mere animals.