ἔσεσθε

From LSJ

κάλλιστον τὸ δικαιότατον, λῷστον δ' ὑγιαίνειν → nothing is more beautiful than being just, but nothing is more pleasant than being healthy | Most beautiful is what is most just; the best thing is to be healthy.

Source

French (Bailly abrégé)

2ᵉ pl. fut. de εἰμί.