cf. Pythag. Aur. Carm. 40 (quoted by Jer. Taylor in Holy Living and Holy Dying):  μηδ᾽ ὕπνον μαλακοῖσιν ἐπ᾽ ὄμμασι προσδέξασθαι, πριν τῶν ἡμερινῶν ἔργων τρὶς ἕκαστον ἐπελθεῖν, πῆ παρέβην; τί δ᾽ ἔρεξα; τί μοι δέον οὐκ ἐτελέσθη.