Hebrews 6:6

and yet have fallen away: for they crucify again to themselves the Son of God, and expose him to public infamy.

Hebrews 10:29

by how much, think ye, shall he be counted worthy of more condign punishment who hath trampled on the Son of God, and regarded the blood of his testament, by which he was sanctified, as an unclean thing, and hath treated the gracious Spirit contumeliously?

Hebrews 6:4

For it is not possible to renew again unto repentance those who have been once illuminated, and have tasted the celestial gift, and have been made partakers of the Holy Ghost,

2 Peter 2:21

For it had been better for them never to have been acquainted with the way of righteousness, than, after knowing it, to have turned aside from the holy commandment delivered unto them.

1 John 5:16

If any person see his brother committing a sin not unto death, he shall request, and God will grant him life for those that sin not unto death. There is a sin unto death: I say not that he should request for that.

Matthew 19:26

And Jesus looking upon them, said unto them, With men this is impossible; but with God all things are possible.

Matthew 23:31-32

Wherefore ye bear a testimony to yourselves, that ye are the children of those who killed the prophets.

Matthew 27:38-44

Then were crucified with him two robbers, one on his right hand, and the other on his left.

Mark 15:29-32

And they who passed along, blasphemed him, shaking their heads, and saying, Aha! thou that destroyest the temple, and buildest it in three days,

Luke 11:48

Ye do indeed bear witness to, and with pleasure concur in your fathers' deeds; for they truly killed them, and ye build their sepulchres.

Luke 23:35-39

And the people stood looking on. And the rulers also with them derided him, saying, He saved others; let him save himself, if this fellow is the Messiah, the elect of God.

2 Timothy 2:25

with meekness correcting those who are opposers, if at last God may give unto them repentance so as to submit to the conviction of the truth;

Hebrews 12:2

earnestly looking up to Jesus the author and the finisher of faith; who, for the joy set before him, endured the cross, despising shame, and hath sat down at the right hand of the throne of God.

Treasury of Scripture Knowledge

Summary

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.

Bible References

To renew

Hebrews 6:4
For it is not possible to renew again unto repentance those who have been once illuminated, and have tasted the celestial gift, and have been made partakers of the Holy Ghost,
2 Timothy 2:25
with meekness correcting those who are opposers, if at last God may give unto them repentance so as to submit to the conviction of the truth;

They crucify

Hebrews 10:29
by how much, think ye, shall he be counted worthy of more condign punishment who hath trampled on the Son of God, and regarded the blood of his testament, by which he was sanctified, as an unclean thing, and hath treated the gracious Spirit contumeliously?
Matthew 23:31
Wherefore ye bear a testimony to yourselves, that ye are the children of those who killed the prophets.
Luke 11:48
Ye do indeed bear witness to, and with pleasure concur in your fathers' deeds; for they truly killed them, and ye build their sepulchres.

An open

Hebrews 12:2
earnestly looking up to Jesus the author and the finisher of faith; who, for the joy set before him, endured the cross, despising shame, and hath sat down at the right hand of the throne of God.
Matthew 27:38
Then were crucified with him two robbers, one on his right hand, and the other on his left.
Mark 15:29
And they who passed along, blasphemed him, shaking their heads, and saying, Aha! thou that destroyest the temple, and buildest it in three days,
Luke 23:35
And the people stood looking on. And the rulers also with them derided him, saying, He saved others; let him save himself, if this fellow is the Messiah, the elect of God.

General references

Mark 3:28
Verily I say unto you, That all sins shall be forgiven to the sons of men, and the blasphemies, whatsoever they may blaspheme:
Luke 12:10
And every one who shall utter a word against the Son of man, it shall be forgiven him; but for him who hath blasphemed against the Holy Ghost, there shall be no forgiveness.
Luke 14:30
saying, This man began to build, and was not able to finish.
1 Peter 2:3
if so be ye have tasted that the Lord is gracious.
Jude 1:22
And of some have compassion, distinguishing their case;