I tell you, Nay: but, except ye repent, ye shall all likewise perish.

Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.

Acts 2:38 (KJV)

If my people, which are called by my name, shall humble themselves, and pray, and seek my face, and turn from their wicked ways; then will I hear from heaven, and will forgive their sin, and will heal their land.

2 Chronicles 7:14 (KJV)

And when he came to himself, he said… I will arise and go to my father, and will say unto him, Father, I have sinned against heaven, and before thee, And am no more worthy to be called thy son.

Luke 15:18 (KJV)

For godly sorrow worketh repentance to salvation not to be repented of: but the sorrow of the world worketh death.

2 Corinthians 7:10 (KJV)

In those days came John the Baptist, preaching in the wilderness of Judaea, And saying, Repent ye: for the kingdom of heaven is at hand.

Matthew 3:2 (KJV)

But if the wicked will turn from all his sins that he hath committed, and keep all my statutes, and do that which is lawful and right, he shall surely live, he shall not die.

Ezekiel 18:21 (KJV)