Matthew 12:31
This is why I tell you that men may find forgiveness for every other sin and impious word, but that for impious speaking against the Holy Spirit they shall find no forgiveness.
1 Corinthians 6:9-11
Do you not know that unrighteous men will not inherit God's Kingdom? Cherish no delusion here. Neither fornicators, nor idolaters, nor adulterers, nor any who are guilty of unnatural crime,
1 John 1:7
But if we live in the light as He is in the light, we have fellowship with one another, and the blood of Jesus, His Son, cleanses us from all sin.
1 John 1:9
If we confess our sins, He is so faithful and just that He forgives us our sins and cleanses us from all unrighteousness.
1 John 2:1-2
Dear children, I write thus to you in order that you may not sin. If any one sins, we have an Advocate with the Father--Jesus Christ the righteous;