Being justified freely by his grace through the redemption that is …

Moreover, brethren, I declare unto you the gospel which I preached unto you, which also ye have received, and wherein ye stand; By which also ye are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain. For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures; And that he was buried, and that he rose again the third day according to the scriptures.

1 Corinthians 15:1 (KJV)

For all have sinned, and come short of the glory of God.

Romans 3:23 (KJV)

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

Romans 6:23 (KJV)

For when we were yet without strength, in due time Christ died for the ungodly. For scarcely for a righteous man will one die: yet peradventure for a good man some would even dare to die. But God commendeth his love toward us, in that, while we were yet sinners, Christ died for us.

Romans 5:6 (KJV)

That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved. For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.

Romans 10:9 (KJV)

Jesus answered and said unto them, This is the work of God, that ye believe on him whom he hath sent.

John 6:29 (KJV)