Ἡ δ' ἐμὴ ψυχὴ πάλαι τέθνηκεν, ὥστε τοῖς θανοῦσιν ὠφελεῖν → My soul died long ago so that I could give some help to the dead
dat. pl. de χόος-χοῦς.
χουσί: dat. pl. к χόος I.