Passage 6.4.4
τὸν δὲ ἀνδριάντα Πυθαγόρας ἐποίησεν ὁ Ῥηγῖνος, εἴπερ τις καὶ ἄλλος ἀγαθὸς τὰ ἐς πλαστικήν. διδαχθῆναι δὲ παρὰ Κλεάρχῳ φασὶν αὐτόν, Ῥηγίνῳ μὲν καὶ αὐτῷ, μαθητῇ δὲ Εὐχείρου· τὸν δὲ Εὔχειρον εἶναι Κορίνθιον, φοιτῆσαι δὲ ὡς Συάδραν τε καὶ Χάρταν Σπαρτιάτας.
The statue was made by Pythagoras of Rhegium, who was an artist of exceptional skill in sculpture, if indeed anyone was. It is said that he was taught by Clearchus, who was himself a native of Rhegium and a pupil of Eucheirus. Eucheirus was from Corinth but had studied under the Spartans Syadras and Chartas.