Didache

Be watchful for your life; let your lamps not be quenched and your loins not ungirdled, but be ye ready; for ye know not the hour the hour in which our Lord cometh.

Γρηγορεῖτε ὑπὲρ τῆς ζωῆς ὑμῶν: οἱ λύχνοι ὑμῶν μὴ σβεσθήτωσαν, καὶ αἱ ὀσφύες ὑμῶν μὴ ἐκλυέσθωσαν, ἀλλὰ γίνεσθε ἕτοιμοι: οὐ γὰρ οἴδατε τὴν ὤραν, ἐν ᾗ ὁ κύριος ἡμῶν ἔρχεται.

And ye shall gather yourselves together frequently, seeking what is fitting for your souls; for the whole time of your faith shall not profit you, if ye be not perfected at the last season.

πυκνῶς δὲ συναχθήσεσθε ζητοῦντες τὰ ἀνήκοντα ταῖς ψυχαῖς ὑμῶν: οὐ γὰρ ὠφελήσει ὑμᾶς ὁ πᾶς χρόνος τῆς πίστεως ὑμῶν, ἐὰν μὴ ἐν τῷ ἐσχάτῳ καιρῷ τελειωθῆτε.