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.
πρὸς τί; ἵνα γνῶσιν ὅτι οὐ δύνανται σωθῆναι, ἑὰν μὴ ἐπ’ αὐτῷ ἐλπίσωσιν. [*](Is. 65, 2)