φωλευτέον
From LSJ
μὴ κακὸν εὖ ἔρξῃς· σπείρειν ἴσον ἔστ' ἐνὶ πόντῳ → do no good to a bad man; it is like sowing in the sea
English (LSJ)
A one must lie hid, lurk, Eun.VSp.476B.
Greek (Liddell-Scott)
φωλευτέον: ῥημ. ἐπίθετ. τοῦ φωλεύω, δεῖ φωλεύειν, Εὐνάπ. 54.