Therefore to him that knoweth to do good, and doeth it not, to him it is sin.  James 4:17

Whosoever committeth sin transgresseth also the law: for sin is the transgression of the law.
1 John 3:4

For by the law is the knowledge of sin.  Romans 3:20

The thought of foolishness is sin. Proverbs 24:9

All unrighteousness is sin: …. We know that whosoever is born of God sinneth not; but he that is begotten of God keepeth himself, and that wicked one toucheth him not.  1 John 5:17-18

He that committeth sin is of the devil; … whosoever is born of God doth not commit sin; for his seed remaineth in him: and he cannot sin, because he is born of God.  1 John 3:8-9

What then? Are we better than they? No, in no wise: for we have before proved both Jews and Gentiles, that they are all under sin.  Romans 3:9

For all have sinned, and come short of the glory of God.  Romans 3:23

Jesus answered them, Verily, verily, I say unto you, Whosoever committeth sin is the servant of sin. John 8:34

For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord. Romans 6:23

If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness. 1 John 1:9

Come now, and let us reason together, saith the Lord: though your sins be as scarlet, they shall be as white as snow; though they be red like crimson, they shall be as wool..  Isaiah 1:18

But God commendeth his love toward us, in that, while we were yet sinners, Christ died for us.  Romans 5:8

For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins, But a certain fearful looking for of judgement and fiery indignation, which shall devour the adversaries.  Hebrews 10:26-27

But if we walk in the light, as he is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleanseth us from all sin. 1 John 1:7

It is a fearful thing to fall into the hands of the living God.  Hebrews 10:31

And now why tarriest thou? Arise, and be baptized, and wash away thy sins, calling on the name of the Lord.  Acts 22:16

Repent ye therefore, and be converted that your sins may be blotted out, when the times of refreshing shall come from the presence of the Lord.  Acts 3:19