Rom 4.4-5 Now to him that worketh is the reward not reckoned of grace, but of debt.
Gal 5.4 Christ is become of no effect unto you, whosoever of you are justified by the law; ye are fallen from grace.
Deut 9.4-5 Speak not thou in thine heart, after that the LORD thy God hath cast them out from before thee, saying, For my righteousness the LORD hath brought me in to possess this land: but for the wickedness of these nations the LORD doth drive them out from before thee.