1Jn 1:9-2:2 (King James)

⁹ If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness. ¹⁰ If we say that we have not sinned, we make him a liar, and his word is not in us.

1 Jean 2

   ¹ My little children, these things write I unto you, that ye sin not. And if any man sin, we have an advocate with the Father, Jesus Christ the righteous: ² And he is the propitiation for our sins: and not for our's only, but also for the sins of the whole world.

1Jn 1:9-2:2 (Stephanus 1550)

⁹ ἐὰν ὁμολογῶμεν τὰς ἁμαρτίας ἡμῶν, πιστός ἐστιν καὶ δίκαιος ἵνα ἀφῇ ἡμῖν τὰς ἁμαρτίας, καὶ καθαρίσῃ ἡμᾶς ἀπὸ πάσης ἀδικίας ¹⁰ ἐὰν εἴπωμεν ὅτι οὐχ ἡμαρτήκαμεν, ψεύστην ποιοῦμεν αὐτὸν, καὶ ὁ λόγος αὐτοῦ οὐκ ἔστιν ἐν ἡμῖν

1 Jean 2

   ¹ τεκνία μου, ταῦτα γράφω ὑμῖν, ἵνα μὴ ἁμάρτητε καὶ ἐάν τις ἁμάρτῃ, παράκλητον ἔχομεν πρὸς τὸν πατέρα, ἰησοῦν χριστὸν δίκαιον ² καὶ αὐτὸς ἱλασμός ἐστιν περὶ τῶν ἁμαρτιῶν ἡμῶν οὐ περὶ τῶν ἡμετέρων δὲ μόνον, ἀλλὰ καὶ περὶ ὅλου τοῦ κόσμου