Passage 7.13.8
ἐξεγείρας δὲ αὖθις Λακεδαιμονίοις καὶ Ἀχαιοῖς πόλεμον ἐν ἐγκλήμασί τε ἦν ὑπὸ τῶν πολιτῶν καὶ--- οὐ γάρ τινα ἐκ τοῦ προσδοκωμένου κινδύνου Λακεδαιμονίοις σωτηρίαν εὕρισκεν---ἀφίησιν ἑκουσίως τὴν ψυχὴν πιὼν φάρμακον. καὶ Μεκαλκίδᾳ μὲν τέλος τοιοῦτον ἐγένετο, ἄρξαντι ἐν τῷ ἑαυτοῦ νῷ τότε μὲν Λακεδαιμονίων ὡς ἂν ὁ ἀμαθέστατος στρατηγός, πρότερον δὲ ἔτι τοῦ Ἀχαιῶν ἔθνους ὡς ἀνθρώπων ὁ ἀδικώτατος.
After having once again stirred up war between the Lacedaemonians and the Achaeans, he fell under accusations by his own citizens and—since he found no escape for the Lacedaemonians from the impending peril openly confronting them—he willingly ended his life by drinking poison. Such was the end of Menalcidas, who in his mind had once governed the Lacedaemonians as their most incompetent general, and earlier had headed the Achaean nation as the most unjust of men.