Passage 5.27.1
τούτων δὲ ἀντικρὺ τῶν κατειλεγμένων ἔστιν ἄλλα ἀναθήματα ἐπὶ στοίχου, τετραμμένα μὲν πρὸς μεσημβρίαν, τοῦ τεμένους δὲ ἐγγύτατα ὃ τῷ Πέλοπι ἀνεῖται. ἐν δὲ αὐτοῖς καὶ τὰ ἀνατεθέντα ἐστὶν ὑπὸ τοῦ Μαιναλίου Φόρμιδος, ὃς ἐκ Μαινάλου διαβὰς ἐς Σικελίαν παρὰ Γέλωνα τὸν Δεινομένους καὶ ἐκείνῳ τε αὐτῷ καὶ Ἱέρωνι ὕστερον ἀδελφῷ τοῦ Γέλωνος ἐς τὰς στρατείας ἀποδεικνύμενος λαμπρὰ ἔργα ἐς τοσοῦτο προῆλθεν εὐδαιμονίας, ὡς ἀναθεῖναι μὲν ταῦτα ἐς Ὀλυμπίαν, ἀναθεῖναι δὲ καὶ τῷ Ἀπόλλωνι δὲ ἄλλα ἐς Δελφούς.
Directly opposite the dedications I have just listed are some other offerings arranged in a row, facing south, situated closest to the precinct dedicated to Pelops. Among them are the dedications set up by Phormis from Maenalus. Having gone from Maenalus to Sicily, Phormis served under Gelon son of Deinomenes, and afterwards under Gelon's brother Hieron; distinguishing himself brilliantly in their campaigns, he became so prosperous that he dedicated these offerings at Olympia, and others as well to Apollo at Delphi.