Δέλφειος

From LSJ

αἰὲν ἀριστεύειν καὶ ὑπείροχον ἔμμεναι ἄλλων → always strive for excellence and prevail over others (Iliad 6.208, 11.784)

Source

Spanish (DGE)

-α, -ον delfio, de Delfos βωμός h.Ap.496.