Αἰγυπτιάς

From LSJ

ἀλλὰ τῷ ὕψει τῶν θείων ἐντολῶν σου → but by the sublimity of thy divine commandments

Source

Spanish (DGE)

-άδος, ἡ egipcio, de Egipto γῆ Orac.Sib.5.507.