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V B 467
DIOG. LAERT. VI 34:
κληθεὶς [scil. Diogenes] ἐπὶ δεῖπνον οὐκ ἔφη παρέσεσθαι˙ μηδὲ γὰρ πρώην αὐτῷ χάριν ἐγνωκέναι.