Laudator Temporis Acti

Procopius, History of the Wars 4.7.14-15 (tr. H.B. Dewing):

Accordingly Gelimer came before him in that place, laughing with such laughter as was neither moderate nor the kind one could conceal, and some of those who were looking at him suspected that by reason of the extremity of his affliction he had changed entirely from his natural state and that, already beside himself, he was laughing for no reason. But his friends would have it that the man was in his sound mind, and that because he had been born in a royal family, and had ascended the throne, and had been clothed with great power and immense wealth from childhood even to old age, and then being, driven to flight and plunged into great fear had undergone the sufferings on Papua, and now had come as a captive, having in this way had experience of all the gifts of fortune, both good and evil, for this reason, they believed, he thought that man's lot was worthy of nothing else than much laughter.

ἔνθα δὴ ὁ Γελίμερ παρ᾿ αὐτὸν εἰσῆλθε, γελῶν γέλωτα οὔτε φαῦλον οὔτε κρύπτεσθαι ἱκανὸν ὄντα, τῶν τε αὐτὸν θεωμένων ἔνιοι μὲν τῇ τοῦ πάθους ὑπερβολῇ ἁπάντων τε αὐτὸν ἐκστῆναι τῶν κατὰ φύσιν ὑπώπτευον καὶ παραπαίοντα ἤδη λόγῳ οὐδενὶ τὸν γέλωτα ἔχειν. οἱ μέντοι φίλοι ἀγχίνουν τε τὸν ἄνθρωπον ἐβούλοντο εἶναι καὶ ἅτε οἰκίας μὲν βασιλικῆς γεγονότα, εἰς βασιλείαν δὲ ἀναβεβηκότα, καὶ δύναμίν τε ἰσχυρὰν χρήματά τε μεγάλα ἐκ παιδὸς ἄχρι καὶ ἐς γῆρας περιβαλόμενον, εἶτα εἰς φυγήν τε καὶ δέος πολὺ ἐμπεσόντα καὶ κακοπάθειαν τὴν ἐν Παπούᾳ ὑποστάντα, καὶ νῦν ἐν αἰχμαλώτων λόγῳ ἥκοντα, πάντων τε ταύτῃ τῶν ἀπὸ τῆς τύχης ἀγαθῶν τε καὶ φλαύρων ἐν πείρᾳ γεγονότα, ἄλλου οὐδενὸς ἄξια τὰ ἀνθρώπινα ἢ γέλωτος πολλοῦ οἴεσθαι εἶναι.

See Judith Hagen, "Laughter in Procopius' Wars," in Albrecht Classen, ed., Laughter in the Middle Ages and Early Modern Times (Berlin: Walter de Gruyter, 2010), pp. 141-164 (at 159-163).