Shepherd of Hermas — Similitude 9.16
For before a person bears the name of the Son of God, he says, that person is dead; but when he receives the seal, he puts away the deadness and takes up life.
The seal, then, is the water: into the water the dead go down, and they come up living. So this seal was also preached to them, and they used it, so that they might enter the kingdom of God.
Greek
πρὶν γάρ, φησί, φορέσαι τὸν ἄνθρωπον τὸ ὄνομα τοῦ υἱοῦ τοῦ θεοῦ, νεκρός ἐστιν· ὅταν δὲ λάβῃ τὴν σφραγῖδα, ἀποτίθεται τὴν νέκρωσιν καὶ ἀναλαμβάνει τὴν ζωήν. ἡ σφραγὶς οὖν τὸ ὕδωρ ἐστίν· εἰς τὸ ὕδωρ οὖν καταβαίνουσι νεκροὶ καὶ ἀναβαίνουσι ζῶντες. κἀκείνοις οὖν ἐκηρύχθη ἡ σφραγὶς αὕτη καὶ ἐχρήσαντο αὐτῇ, ἵνα εἰσέλθωσιν εἰς τὴν βασιλείαν τοῦ θεοῦ.