1 John 1:9-2:3

King James Version

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.

2 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 ours only, but also for the sins of the whole world.

³ And hereby we do know that we know him, if we keep his commandments.