1 John 5:16
If anyone sees his brother committing a sin not leading to death, he should ask God, who will give life to those who commit this kind of sin. There is a sin that leads to death; I am not saying he should ask regarding that sin.
Cross References
Numbers 15:30
But the person who sins defiantly, whether a native or foreigner, blasphemes the LORD. That person shall be cut off from his people.

1 Samuel 12:19
They pleaded with Samuel, "Pray to the LORD your God for your servants, so we will not die! For we have added to all our sins the evil of asking for a king."

Job 42:8
So now, take seven bulls and seven rams, go to My servant Job, and sacrifice a burnt offering for yourselves. Then My servant Job will pray for you, for I will accept his prayer and not deal with you according to your folly. For you have not spoken accurately about Me, as My servant Job has."

Jeremiah 7:16
As for you, do not pray for these people. Do not offer a plea or petition on their behalf, and do not beg Me, for I will not listen to you.

Jeremiah 11:14
As for you, do not pray for these people. Do not raise up a cry or a prayer on their behalf, for I will not be listening when they call out to Me at the time of their disaster.

Jeremiah 14:11
Then the LORD said to me, "Do not pray for the well-being of this people.

Hebrews 6:4
It is impossible for those who have once been enlightened, who have tasted the heavenly gift, who have shared in the Holy Spirit,

Hebrews 6:6
and then have fallen away--to be restored again to repentance, because they themselves are crucifying the Son of God all over again and subjecting Him to open shame.

Hebrews 10:26
If we deliberately go on sinning after we have received the knowledge of the truth, no further sacrifice for sins remains,

James 5:15
And the prayer offered in faith will restore the one who is sick. The Lord will raise him up. If he has sinned, he will be forgiven.

1 John 5:17
All unrighteousness is sin, yet there is sin that does not lead to death.

Treasury of Scripture Knowledge

he shall ask.

Genesis 20:7, 17
Now return the man's wife, for he is a prophet; he will pray for you and you will live. But if you do not restore her, be aware that you will surely die--you and all who belong to you." . . .

Exodus 32:10-14, 31, 32
Now leave Me alone, so that My anger may burn against them and consume them. Then I will make you into a great nation." . . .

Exodus 34:9
"O Lord, " he said, "if I have indeed found favor in Your sight, my Lord, please go with us. Although this is a stiff-necked people, forgive our iniquity and sin, and take us as Your inheritance."

Numbers 12:13
So Moses cried out to the LORD, "O God, please heal her!"

Numbers 14:11-21
And the LORD said to Moses, "How long will this people treat Me with contempt? How long will they refuse to believe in Me, despite all the signs I have performed among them? . . .

Deuteronomy 9:18-20
Then I fell down before the LORD for forty days and forty nights, as I had done the first time. I did not eat bread or drink water because of all the sin you had committed in doing what was evil in the LORD's sight and provoking Him to anger. . . .

2 Chronicles 30:18-20
A large number of the people--many from Ephraim, Manasseh, Issachar, and Zebulun--had not purified themselves, yet they ate the Passover, contrary to what was written. But Hezekiah interceded for them, saying, "May the LORD, who is good, provide atonement for everyone . . .

Job 42:7-9
After the LORD had spoken these words to Job, He said to Eliphaz the Temanite, "My wrath is kindled against you and your two friends. For you have not spoken about Me accurately, as My servant Job has. . . .

Psalm 106:23
So He said He would destroy them--had not Moses His chosen one stood before Him in the breach to divert His wrath from destroying them.

Ezekiel 22:30
I searched for a man among them to repair the wall and stand in the gap before Me on behalf of the land, so that I should not destroy it. But I found no one.

Amos 7:1-3
This is what the Lord GOD showed me: He was preparing swarms of locusts just after the king's harvest, as the late spring crop was coming up. . . .

James 5:14, 15
Is any one of you sick? He should call the elders of the church to pray over him and anoint him with oil in the name of the Lord. . . .

There.

Numbers 15:30
But the person who sins defiantly, whether a native or foreigner, blasphemes the LORD. That person shall be cut off from his people.

Numbers 16:26-32
And he warned the congregation, "Move away now from the tents of these wicked men. Do not touch anything that belongs to them, or you will be swept away because of all their sins." . . .

1 Samuel 2:25
If a man sins against another man, God can intercede for him, but if a man sins against the LORD, who can intercede for him?" But they would not listen to their father, since the LORD intended to put them to death.

Jeremiah 15:1, 2
Then the LORD said to me: "Even if Moses and Samuel should stand before Me, My heart would not go out to this people. Send them from My presence, and let them go. . . .

Matthew 12:31, 32
Therefore I tell you, every sin and blasphemy will be forgiven men, but the blasphemy against the Spirit will not be forgiven. . . .

Mark 3:28-30
Truly I tell you, the sons of men will be forgiven all sins and blasphemies, as many as they utter. . . .

Luke 12:10
And everyone who speaks a word against the Son of Man will be forgiven, but whoever blasphemes against the Holy Spirit will not be forgiven.

2 Timothy 4:14
Alexander the coppersmith did great harm to me. The Lord will repay him according to his deeds.

Hebrews 6:4-6
It is impossible for those who have once been enlightened, who have tasted the heavenly gift, who have shared in the Holy Spirit, . . .

Hebrews 10:26-31
If we deliberately go on sinning after we have received the knowledge of the truth, no further sacrifice for sins remains, . . .

2 Peter 2:20-22
If indeed they have escaped the corruption of the world through their knowledge of the Lord and Savior Jesus Christ, only to be entangled and overcome by it again, their final condition is worse than it was at first. . . .

I do not.

Jeremiah 7:16
As for you, do not pray for these people. Do not offer a plea or petition on their behalf, and do not beg Me, for I will not listen to you.

Jeremiah 11:14
As for you, do not pray for these people. Do not raise up a cry or a prayer on their behalf, for I will not be listening when they call out to Me at the time of their disaster.

Jeremiah 14:11
Then the LORD said to me, "Do not pray for the well-being of this people.

Jeremiah 18:18-21
Then some said, "Come, let us make plans against Jeremiah, for the law will never be lost to the priest, or counsel to the wise, or an oracle to the prophet. Come, let us denounce him and pay no heed to any of his words." . . .

John 17:9
I ask on their behalf. I do not ask on behalf of the world, but on behalf of those You have given Me; for they are Yours.

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