Hebrews 6:1-6

Wherefore leaving the doctrine of the first principles of Christ, let us press on unto perfection; not laying again a foundation of repentance from dead works, and of faith toward God, of the teaching of baptisms, and of laying on of hands, and of resurrection of the dead, and of eternal judgment. And this will we do, if God permit. For as touching those who were once enlightened and tasted of the heavenly gift, and were made partakers of the Holy Spirit, and tasted the good word of God, and the powers of the age to come, and then fell away, it is impossible to renew them again unto repentance; seeing they crucify to themselves the Son of God afresh, and put him to an open shame.