Bible Verses About Self-Righteousness: Ineffectual for salvation

If I wash myself with snow water, and make my hands never so clean;

Yet shalt thou plunge me in the ditch, and mine own clothes shall abhor me.

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.

Therefore by the deeds of the law there shall no flesh be justified in his sight: for by the law is the knowledge of sin.