ἔστιν Ὀλυμπίασι κατὰ μέσον τὸν ἱππόδρομον Ταραξίππου Ποσειδῶνος βωμός, 
ἔνθα μάλιστα συνέβαινε τοὺς ἵππους πτοεῖσθαι καὶ πλεῖστα διαφθείρεσθαι τῶν 
ἁρμάτων. ἔδοξεν οὖν τοῖς Ἠλείοις ὡς δαιμονίου τινὸς ὄντος ἱδρύσασθαι βωμόν. 
καὶ τὸ λοιπόν φασιν ἀπ´ ἐκείνου γεγονέναι τὸν τόπον ἀσφαλῆ.

There is at Olympia, at the centre of the race-course, an altar to Poseidon 
Taraxippos, or Terror of Horses, on the spot where it happened that the horses most 
frequently became frightened and where many chariots were smashed. So the Eleans 
decided to erect an altar on the spot, believing that some deity was there. And from 
that time forward, they say, the place has been safe.

Trad. anglaise : J.W. COHOON - H. Lamar CROSBY, Dio Chrysostom. 
 Vol. III. London, Heinemann, 1940