Ἀκραίφνιον

From LSJ

ἐν οἰκίᾳ τυφλῶν καὶ ὁ νυκτάλωψ ὀξυδερκήςeven the day-blind is sharp-eyed in a blind house | among the blind, the one-eyed man is king

Source

Spanish (DGE)

v. Ἀκραιφία.