Romans 4:5
"But to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness."
Cross References (ranked by relevance)
And be found in him, not having mine own righteousness, which is of the law, but that which is through the faith of Christ, the righteousness which is of God by faith:
Even the righteousness of God which is by faith of Jesus Christ unto all and upon all them that believe: for there is no difference:
For they being ignorant of God’s righteousness, and going about to establish their own righteousness, have not submitted themselves unto the righteousness of God.
Jesus answered and said unto them, This is the work of God, that ye believe on him whom he hath sent.
Verily, verily, I say unto you, He that heareth my word, and believeth on him that sent me, hath everlasting life, and shall not come into condemnation; but is passed from death unto life.
For what saith the scripture? Abraham believed God, and it was counted unto him for righteousness.
Behold, his soul which is lifted up is not upright in him: but the just shall live by his faith.