Aelian, Varia Historia 14.44
Λακωνικὸν μειράκιον ἐπρίατο χωρίον ὑπερεύωνον, εἶτα ἐπὶ τὰς ἀρχὰς ἤχθη καὶ ἐζημιώθη. τὸ δὲ αἴτιον τῆς καταδίκης ἐκεῖνο ἦν, ἐπεὶ νέος ὢν τοῦ κερδαίνειν ὀξύτατα ἤρα. ἦν δὲ Λακεδαιμονίων ἐν τοῖς μάλιστα ἀνδρικὸν καὶ τοῦτο, μὴ πρὸς μόνους πολεμίους παρατετάχθαι ἀλλὰ καὶ πρὸς ἀργύριον.
A Spartan lad bought a piece of land for a very cheap price, for which he was taken to the magistrates and fined. The reason for the judgement was that, even at a young age, he had a very keen desire for gain. This was one of the Spartans’ most manly qualities – that they arrayed themselves in battle-order not only against their enemies but also against money.