Thucydides 2.34.1-7 (tr. C.F. Smith):
In the course of the same winter the Athenians, following the custom of their fathers, celebrated at the public expense the funeral rites of the first who had fallen in this war. The ceremony is as follows. The bones of the departed lie in state for the space of three days in a tent erected for that purpose, and each one brings to his own dead any offering he desires. On the day of the funeral coffins of cypress wood are borne on wagons, one for each tribe, and the bones of each are in the coffin of his tribe. One empty bier, covered with a pall, is carried in the procession for the missing whose bodies could not be found for burial. Any one who wishes, whether citizen or stranger, may take part in the funeral procession, and the women who are related to the deceased are present at the burial and make lamentation. The coffins are laid in the public sepulchre, which is situated in the most beautiful subaurb of the city; there they always bury those fallen in war, except indeed those who fell at Marathon; for their valour the Athenians judged to be preëminent and they buried them on the spot where they fell. But when the remains have been laid away in the earth, a man chosen by the state, who is regarded as best endowed with wisdom and is foremost in public esteem, delivers over them an appropriate eulogy. After this the people depart. In this manner they bury; and throughout the war, whenever occasion arose, they observed this custom.
Ἐν δὲ τῷ αὐτῷ χειμῶνι Ἀθηναῖοι τῷ πατρίῳ νόμῳ χρώμενοι δημοσίᾳ ταφὰς ἐποιήσαντο τῶν ἐν τῷδε τῷ πολέμῳ πρώτων ἀποθανόντων τρόπῳ τοιῷδε. τὰ μὲν ὀστᾶ προτίθενται τῶν ἀπογενομένων πρότριτα σκηνὴν ποιήσαντες, καὶ ἐπιφέρει τῷ αὐτοῦ ἕκαστος ἤν τι βούληται· ἐπειδὰν δὲ ἡ ἐκφορὰ ᾖ, λάρνακας κυπαρισσίνας ἄγουσιν ἅμαξαι, φυλῆς ἑκάστης μίαν· ἔνεστι δὲ τὰ ὀστᾶ ἧς ἕκαστος ἦν φυλῆς. μία δὲ κλίνη κενὴ φέρεται ἐστρωμένη τῶν ἀφανῶν, οἳ ἂν μὴ εὑρεθῶσιν ἐς ἀναίρεσιν. ξυνεκφέρει δὲ ὁ βουλόμενος καὶ ἀστῶν καὶ ξένων, καὶ γυναῖκες πάρεισιν αἱ προσήκουσαι ἐπὶ τὸν τάφον ὀλοφυρόμεναι.
τιθέασιν οὖν ἐς τὸ δημόσιον σῆμα, ὅ ἐστιν ἐπὶ τοῦ καλλίστου προαστείου τῆς πόλεως καὶ αἰεὶ ἐν αὐτῷ θάπτουσι τοὺς ἐκ τῶν πολέμων πλήν γε τοὺς ἐν Μαραθῶνι· ἐκείνων δὲ διαπρεπῆ τὴν ἀρετὴν κρίναντες αὐτοῦ καὶ τὸν τάφον ἐποίησαν. ἐπειδὰν δὲ κρύψωσι γῇ, ἀνὴρ ᾑρημένος ὑπὸ τῆς πόλεως ὃς ἂν γνώμῃ τε δοκῇ μὴ ἀξύνετος εἶναι καὶ ἀξιώσει προήκῃ, λέγει ἐπ᾿ αὐτοῖς ἔπαινον τὸν πρέποντα· μετὰ δὲ τοῦτο ἀπέρχονται. ὧδε μὲν θάπτουσιν· καὶ διὰ παντὸς τοῦ πολέμου, ὁπότε ξυμβαίη αὐτοῖς, ἐχρῶντο τῷ νόμῳ.