ἀργύρεια μέταλλα
From LSJ
ὃν οὐ τύπτει λόγος οὐδὲ ῥάβδος → if words don't get through, neither a beating will | if the carrot doesn't work, the stick will not work either | whom words do not strike, neither does the rod
Greek > English (Woodhouse)
Lexicon Thucydideum
argenti fodinae, silver mines, 2.55.1, 6.91.7, [in utroq. loco nonnulli codd. in both places some manuscripts ἀργύρεα.]