ἐπιτηδευτέον
From LSJ
τῶν δ᾽ ὀρθουμένων σῴζει τὰ πολλὰ σώμαθ᾽ ἡ πειθαρχία → But of those who make it through, following orders is what saves most of their lives (Sophocles, Antigone 675f.)
English (LSJ)
A onemust pursue, Pl.Lg. 858d. Adj. -τέος, α, ον, to be pursued, Plu.2.10b.
Greek (Liddell-Scott)
ἐπιτηδευτέον: ῥημ. ἐπίθ. τοῦ ἐπιτηδεύω, δεῖ ἐπιτηδεύειν, Πλάτ. Νόμ. 858D.