1 Therefore leaving the principles of the doctrine
  of Christ, let us go on unto perfection; not laying
  again the foundation of repentance from dead works,
  and of faith toward God,
   2 Of the doctrine of baptisms, and of laying on of
  hands, and of resurrection of the dead, and of
  eternal judgment.
   3 And this will we do, if God permit.
   4 For it is impossible for those who were once
  enlightened, and have tasted of the heavenly gift,
  and were made partakers of the Holy Ghost,
   5 And have tasted the good word of God, and the
  powers of the world to come,
   6 If they shall fall away, to renew them again unto
  repentance; seeing they crucify to themselves the Son
  of God afresh, and put him to an open shame.
   7 For the earth which drinketh in the rain that
  cometh oft upon it, and bringeth forth herbs meet for
  them by whom it is dressed, receiveth blessing from
  God:
   8 But that which beareth thorns and briers is
  rejected, and is nigh unto cursing; whose end is to
  be burned.
   9 But, beloved, we are persuaded better things of
  you, and things that accompany salvation, though we
  thus speak.
  10 For God is not unrighteous to forget your work and
  labour of love, which ye have shewed toward his name,
  in that ye have ministered to the saints, and do
  minister.
  11 And we desire that every one of you do shew the
  same diligence to the full assurance of hope unto the
  end:
  12 That ye be not slothful, but followers of them who
  through faith and patience inherit the promises.
  13 For when God made promise to Abraham, because he
  could swear by no greater, he sware by himself,
  14 Saying, Surely blessing I will bless thee, and
  multiplying I will multiply thee.
  15 And so, after he had patiently endured, he
  obtained the promise.
  16 For men verily swear by the greater: and an oath
  for confirmation is to them an end of all strife.
  17 Wherein God, willing more abundantly to shew unto
  the heirs of promise the immutability of his counsel,
  confirmed it by an oath:
  18 That by two immutable things, in which it was
  impossible for God to lie, we might have a strong
  consolation, who have fled for refuge to lay hold
  upon the hope set before us:
  19 Which hope we have as an anchor of the soul, both
  sure and stedfast, and which entereth into that
  within the veil;
  20 Whither the forerunner is for us entered, even
  Jesus, made an high priest for ever after the order
  of Melchisedec.

...to Hebrews chapter 7