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,

Galatians 3:2

This only would I learn of you, Received ye the Spirit by the works of the law, or from hearing of the faith?

Ephesians 2:8

For by grace ye are saved through faith, and this not of yourselves; it is the gift of God:

Hebrews 10:32

But remember the past days in which, after ye had been illuminated, ye endured a great conflict of sufferings;

John 4:10

Jesus answered and said to her, If thou hadst known the gift of God, and who he is that speaketh to thee, thou wouldest have requested him, and he would have given thee life-giving water.

Hebrews 2:4

God superadding his testimony with them, by signs, and wonders, and various miracles, and gifts of the Holy Ghost, according to his own will?

Galatians 3:5

He therefore who ministereth to you a supply of the Spirit, and powerfully worketh miracles among you, doth he it by the works of the law, or by the hearing of the faith?

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 10:26-29

For if we sin wilfully after we have received the knowledge of the truth, no more sacrifice for sins remaineth;

2 Peter 2:20-22

For if having escaped from the defilements of the world by the knowledge of our Lord and Saviour Jesus Christ, they are again enveloped by them and overcome, their last deeds are worse than the first.

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 5:13

Ye are the salt of the earth: but if the salt become insipid, with what can it be salted? it is of no farther use for any purpose, but to be cast out, and trodden under foot of men.

Matthew 7:21-22

Not every one who saith to me, Lord, Lord! shall enter into the kingdom of heaven; but he that doeth the will of my Father who is in heaven.

Matthew 12:31-32

Therefore I say unto you, All sin and blasphemy shall be forgiven to men; but the blasphemy against the Spirit shall not be forgiven to men.

Matthew 12:45

Then goeth he, and taketh with himself seven other spirits more wicked than himself, and they enter in and dwell there: and the last state of that man is worse than the first. So shall it also be with this wicked generation.

Luke 10:19-20

Behold, I give you power to tread on serpents and scorpions, and over all the power of the enemy; and nothing shalt in any wise hurt you.

Luke 11:24-26

When the unclean spirit goeth out of a man, he passes through places destitute of water, seeking repose; and not finding it, saith, I will go back to my habitation from whence I came out:

John 3:27

John answered and said, A man cannot assume any thing, except it be given him from heaven.

John 6:32

Then said Jesus unto them, Verily, verily, I tell you, It was not Moses who gave you the bread from heaven; but my Father giveth you the real bread from heaven.

John 15:6

If any man abide not in me, he is cast out as a branch, and withered; and men gather them, and cast them into the fire, and they are burned.

Acts 8:20

But Peter said unto him, May thy silver with thyself go into perdition, because thou hast imagined that the gift of God can be purchased with money.

Acts 10:45

And they of the circumcision who were believers, as many as came with Peter, were amazed, because even on the Gentiles the gift of the holy Ghost was poured out.

1 Corinthians 13:1-2

THOUGH I speak with the tongues of men and of angels, but have not love, I am become as sounding brass, and tinkling cymbal.

Ephesians 3:7

of which I am made a minister, according to the gift of the grace of God, which was given unto me by the effectual working of his power.

Acts 11:17

If God then gave an equal gift to them even as to us, on believing on the Lord Jesus Christ; I, indeed, who was I, that I should be able to restrain God?

Acts 15:8

And God, who is the discerner of the heart, bore them witness, giving them the Holy Ghost, even as to us;

Romans 1:11

For I long to see you, that I may impart unto you some spiritual gift, in order that you may be established;

Ephesians 4:7

But to every one of us hath the grace been given, according to the measure of the gift of Christ.

1 Timothy 4:14

Neglect not the gift which is in thee, which was given thee by prophecy, with imposition of the hands of the presbytery.

2 Timothy 4:14

Alexander the brazier did me many ill offices: the Lord repay him according to his works:

Hebrews 12:15-17

carefully observing lest any of you fail of attaining the grace of God; lest any root of bitterness springing up trouble you, and by it many be defiled;

James 1:17-18

Every good gift, and every perfect gift, is from above, descending from the father of illuminations, with whom there is no variableness, nor shadow of change.

Treasury of Scripture Knowledge

Bible References

It is

Hebrews 10:26
For if we sin wilfully after we have received the knowledge of the truth, no more sacrifice for sins remaineth;
Hebrews 12:15
carefully observing lest any of you fail of attaining the grace of God; lest any root of bitterness springing up trouble you, and by it many be defiled;
Matthew 5:13
Ye are the salt of the earth: but if the salt become insipid, with what can it be salted? it is of no farther use for any purpose, but to be cast out, and trodden under foot of men.
Matthew 12:31
Therefore I say unto you, All sin and blasphemy shall be forgiven to men; but the blasphemy against the Spirit shall not be forgiven to men.
Luke 11:24
When the unclean spirit goeth out of a man, he passes through places destitute of water, seeking repose; and not finding it, saith, I will go back to my habitation from whence I came out:
John 15:6
If any man abide not in me, he is cast out as a branch, and withered; and men gather them, and cast them into the fire, and they are burned.
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;
2 Timothy 4:14
Alexander the brazier did me many ill offices: the Lord repay him according to his works:
2 Peter 2:20
For if having escaped from the defilements of the world by the knowledge of our Lord and Saviour Jesus Christ, they are again enveloped by them and overcome, their last deeds are worse than the first.
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.

Were once

Hebrews 10:32
But remember the past days in which, after ye had been illuminated, ye endured a great conflict of sufferings;

And have

Matthew 7:21
Not every one who saith to me, Lord, Lord! shall enter into the kingdom of heaven; but he that doeth the will of my Father who is in heaven.
Luke 10:19
Behold, I give you power to tread on serpents and scorpions, and over all the power of the enemy; and nothing shalt in any wise hurt you.
John 3:27
John answered and said, A man cannot assume any thing, except it be given him from heaven.
John 4:10
Jesus answered and said to her, If thou hadst known the gift of God, and who he is that speaketh to thee, thou wouldest have requested him, and he would have given thee life-giving water.
John 6:32
Then said Jesus unto them, Verily, verily, I tell you, It was not Moses who gave you the bread from heaven; but my Father giveth you the real bread from heaven.
Acts 8:20
But Peter said unto him, May thy silver with thyself go into perdition, because thou hast imagined that the gift of God can be purchased with money.
Acts 10:45
And they of the circumcision who were believers, as many as came with Peter, were amazed, because even on the Gentiles the gift of the holy Ghost was poured out.
Acts 11:17
If God then gave an equal gift to them even as to us, on believing on the Lord Jesus Christ; I, indeed, who was I, that I should be able to restrain God?
Romans 1:11
For I long to see you, that I may impart unto you some spiritual gift, in order that you may be established;
1 Corinthians 13:1
THOUGH I speak with the tongues of men and of angels, but have not love, I am become as sounding brass, and tinkling cymbal.
Ephesians 2:8
For by grace ye are saved through faith, and this not of yourselves; it is the gift of God:
Ephesians 3:7
of which I am made a minister, according to the gift of the grace of God, which was given unto me by the effectual working of his power.
Ephesians 4:7
But to every one of us hath the grace been given, according to the measure of the gift of Christ.
1 Timothy 4:14
Neglect not the gift which is in thee, which was given thee by prophecy, with imposition of the hands of the presbytery.
James 1:17
Every good gift, and every perfect gift, is from above, descending from the father of illuminations, with whom there is no variableness, nor shadow of change.

Partakers

Hebrews 2:4
God superadding his testimony with them, by signs, and wonders, and various miracles, and gifts of the Holy Ghost, according to his own will?
Acts 15:8
And God, who is the discerner of the heart, bore them witness, giving them the Holy Ghost, even as to us;
Galatians 3:2
This only would I learn of you, Received ye the Spirit by the works of the law, or from hearing of the faith?

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.
Jude 1:22
And of some have compassion, distinguishing their case;