Passage 5.1.7
Πέλοψ δὲ ἀποθανόντος Οἰνομάου τήν τε Πισαίαν ἔσχε καὶ Ὀλυμπίαν, ἀποτεμόμενος τῆς Ἐπειοῦ χώρας ὅμορον οὖσαν τῇ Πισαίᾳ· Ἑρμοῦ τε ἐν Πελοποννήσῳ ναὸν ἱδρύσασθαι καὶ θῦσαι τῷ θεῷ Πέλοπα ἔλεγον οἱ Ἠλεῖοι πρῶτον, ἀποτρεπόμενον τὸ ἐπὶ τῷ Μυρτίλου θανάτῳ μήνιμα ἐκ τοῦ θεοῦ.
After the death of Oenomaüs, Pelops obtained the land of Pisa and Olympia, having separated it from the territory of the Epeians, which bordered upon Pisa. The Eleans said that Pelops was the first in the Peloponnese to build a temple to Hermes and offer sacrifices to the god, seeking thereby to avert the divine wrath arising from the death of Myrtilus.