κενωτέον
From LSJ
ὁ δ' εὖ ἔρδων θεοὺς ἐλπίδι κυδροτέρᾳ σαίνει κέαρ → but he who does well to the gods cheers his heart with a more glorious hope
English (LSJ)
A one must purge, Gal.17(2).359, cf. 10.904, Ruf. ap. Orib.7.26.18.
Greek (Liddell-Scott)
κενωτέον: ῥημ. ἐπίθετ. τοῦ κενόω, δεῖ κενοῦν, Ροῦφ. παρ’ Ὀρειβασ. ΙΙ. 97, 9, Γαλην.