Passage 9.17.3
πλησίον δὲ Ἀμφιτρύωνος ἀνάθημα δύο ἀγάλματα λίθινα λέγουσιν Ἀθηνᾶς ἐπίκλησιν Ζωστηρίας· λαβεῖν γὰρ τὰ ὅπλα αὐτὸν ἐνταῦθα, ἡνίκα Εὐβοεῦσι καὶ Χαλκώδοντι ἔμελλεν ἀντιτάξεσθαι. τὸ δὲ ἐνδῦναι τὰ ὅπλα ἐκάλουν ἄρα οἱ παλαιοὶ ζώσασθαι· καὶ δὴ Ὅμηρον, Ἄρει τὸν Ἀγαμέμνονα ποιήσαντα ἐοικέναι τὴν ζώνην, τῶν ὅπλων τὴν σκευήν φασιν εἰκάζειν.
Near the dedication of Amphitryon, they say, are two stone statues of Athena, surnamed Zosteria ("Girding"). For it was at this place, they say, that he put on his arms, when he was about to engage in battle against the Euboeans and Chalkodon. Indeed, the ancients called the act of putting on armor "girding oneself" (zosasthai). Thus they explain Homer, asserting that when Homer likens Agamemnon’s equipment of armor to the war-belt (zone) of Ares, he too refers metaphorically to the putting on of armor.