Hebrews 6:1; Hebrews 6:6; Hebrews 12:17

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,
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 .
17 For ye know how that afterward , when he would have inherited the blessing, he was rejected : for he found no place of repentance, though he sought it carefully with tears.