The Epistle of Barnabas
Barnabae epistula
Barnabas. The Apostolic Fathers with an English Translation In Two Volumes. Vol. I. Lake, Kirsopp, editor. Cambridge, MA: Harvard University Press; London: William Heinemann Ltd. 1912.
πέρας γέ τοι λέγει· Ἁγιάσεις αὐτὴν χερσὶν καθαραῖς καὶ καρδίᾳ καθαρᾷ. εἰ οὖν ἣν ὁ θεὸς ἡμέραν ἡγίασεν νῦν τις δύναται ἁγιάσαι καθαρὸς ὢν τῇ καρδίᾳ, ἐν πᾶσιν πεπλανήμεθα.