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.
   4 Now to him that worketh is the reward not reckoned
  of grace, but of debt.
   5 But to him that worketh not, but believeth on him
  that justifieth the ungodly, his faith is counted for
  righteousness.
   6 Even as David also describeth the blessedness of
  the man, unto whom God imputeth righteousness without
  works,
   7 Saying, Blessed are they whose iniquities are
  forgiven, and whose sins are covered.
   8 Blessed is the man to whom the Lord will not
  impute sin.
   9 Cometh this blessedness then upon the circumcision
  only, or upon the uncircumcision also? for we say
  that faith was reckoned to Abraham for righteousness.
  10 How was it then reckoned? when he was in
  circumcision, or in uncircumcision? Not in
  circumcision, but in uncircumcision.
  11 And he received the sign of circumcision, a seal
  of the righteousness of the faith which he had yet
  being uncircumcised: that he might be the father of
  all them that believe, though they be not
  circumcised; that righteousness might be imputed unto
  them also:
  12 And the father of circumcision to them who are not
  of the circumcision only, but who also walk in the
  steps of that faith of our father Abraham, which he
  had being yet uncircumcised.
  13 For the promise, that he should be the heir of the
  world, was not to Abraham, or to his seed, through
  the law, but through the righteousness of faith.
  14 For if they which are of the law be heirs, faith
  is made void, and the promise made of none effect:
  15 Because the law worketh wrath: for where no law
  is, there is no transgression.
  16 Therefore it is of faith, that it might be by
  grace; to the end the promise might be sure to all
  the seed; not to that only which is of the law, but
  to that also which is of the faith of Abraham; who is
  the father of us all,
  17 (As it is written, I have made thee a father of
  many nations,) before him whom he believed, even God,
  who quickeneth the dead, and calleth those things
  which be not as though they were.
  18 Who against hope believed in hope, that he might
  become the father of many nations; according to that
  which was spoken, So shall thy seed be.
  19 And being not weak in faith, he considered not his
  own body now dead, when he was about an hundred years
  old, neither yet the deadness of Sarah's womb:
  20 He staggered not at the promise of God through
  unbelief; but was strong in faith, giving glory to
  God;
  21 And being fully persuaded that, what he had
  promised, he was able also to perform.
  22 And therefore it was imputed to him for
  righteousness.
  23 Now it was not written for his sake alone, that it
  was imputed to him;
  24 But for us also, to whom it shall be imputed, if
  we believe on him that raised up Jesus our Lord from
  the dead;
  25 Who was delivered for our offences, and was raised
  again for our justification.

...to Romans chapter 5