ἐχθές
οἵτινες πόλιν μίαν λαβόντες εὐρυπρωκτότεροι πολύ τῆς πόλεος ἀπεχώρησαν ἧς εἷλον τότε → after taking a single city they returned home, with arses much wider than the city they captured
English (LSJ)
Adv.
A = χθές, yesterday, Ar.Nu.175, Th.616, etc.; ἀπ' ἐ. AP 11.35 (Phld.); μέσφα τό γ' ἐ. Theoc.2.144; οὐ γάρ τι νῦν γε κἀ. today or yesterday, S.Ant.456; οὐκ ἐ. οὐδὲ πρῴην Antipho Fr.58; ἐ. καὶ τρίτης [ἡμέρας] LXX Ru.2.11, cf. M.Ant.10.7. (ἐχθές is commoner than χθές in Com. and LXX, is the only form used in NT, and freq. in papyri of all periods, PSI4.442.21 (iii B.C.), etc.; cf. χθές.)
German (Pape)
[Seite 1124] = χθές, gestern, Ar. Nubb. 175; οὐ νῦν τε κἀχθές, ἀλλ' ἀεί Soph. Ant. 452; τὰ ἐχθὲς καὶ πρώην γεγονότα Plat. Gorg. 470 d; Xen. Cyr. 7, 5, 53 u. öfter, Nach Apollon. in B. A. 556, 30 soll χθές attischer sein, es ist wenigstens häufiger.