Romans 4:1-3 (KJV)
1 What shall we say then that Abraham our father, as pertaining to the flesh, hath found?
2 For if Abraham were justified by works, he hath whereof to glory; but not before God.
3 For what saith the scripture? Abraham believed God, and it was counted unto him for righteousness.
1 Corinthians 1:31 (KJV)
31 That, according as it is written, He that glorieth, let him glory in the Lord.
Matthew 5:20 (KJV)
20 For I say unto you, That except your righteousness shall exceed the righteousness of the scribes and Pharisees, ye shall in no case enter into the kingdom of heaven.