1 John 2:19

They went out from us, but they were not of us; for if they were of us, they would have continued with us. But they went out so that it might be revealed that they were not all of us.

Acts 20:30

Also men shall arise from your own selves, speaking perverse things in order to draw disciples away after them.

1 Corinthians 11:19

For there must also be heresies among you, that the approved ones may be revealed among you.

Deuteronomy 13:13

Men, the sons of Belial, have gone out from among you and have drawn away those who live in their city, saying, Let us go and serve other gods, which you have not known,

Job 17:9

The righteous also shall hold on his way, and he who has clean hands adds strength.

Psalm 37:28

For Jehovah loves judgment and does not forsake His saints; they are kept forever; but the seed of the wicked shall be cut off.

Psalm 41:9

Even a man, my friend, in whom I trusted, who ate of my bread, has lifted up his heel against me.

Psalm 125:1-2

A Song of degrees. They who trust in Jehovah shall be like Mount Zion; it is not shaken, but remains forever.

Jeremiah 32:38-40

And they shall be My people, and I will be their God.

Matthew 13:20-21

But that which was sown on the stony places is this: he who hears the Word and immediately receives it with joy.

Matthew 24:24

For false Christs and false prophets will arise and show great signs and wonders; so much so that, if it were possible, they would deceive even the elect.

Mark 4:5-6

And another fell on stony ground, where it did not have much earth. And it sprang up at once, due to not having deepness of earth.

Mark 4:16-17

And these are those likewise being sown on stony places; who, when they hear the Word, immediately receive it with gladness.

Mark 13:22

For false Christs and false prophets will arise and will give miraculous signs and wonders in order to seduce, if possible, even the elect.

Luke 8:13

Those on the rock are the ones who, when they hear, receive the Word with joy. And these have no root, who for a while believe, and in time of temptation fall away.

John 4:14

but whoever drinks of the water that I shall give him shall never thirst, but the water that I shall give him shall be in him a well of water springing up into everlasting life.

John 6:37-39

All that the Father gives Me shall come to Me, and the one who comes to Me I will in no way cast out.

John 10:28-30

And I give to them eternal life, and they shall never ever perish, and not anyone shall pluck them out of My hand.

John 15:2

Every branch in Me that does not bear fruit, He takes away. And every one that bears fruit, He prunes it so that it may bring forth more fruit.

Acts 15:24

Because we have heard that certain ones who went out from us have troubled you with words, unsettling your souls, saying, Be circumcised and keep the law! (to whom we gave no such command);

Romans 9:6

Not however that the Word of God has failed, for not all those of Israel are Israel;

Romans 11:5-6

Even so then, also in this present time a remnant according to the election of grace has come into being.

2 Timothy 2:10

Therefore I endure all things for the sake of the elect, that they may also obtain the salvation which is in Christ Jesus with eternal glory.

2 Timothy 2:19

Nevertheless the foundation of God stands sure, having this seal: "The Lord knew those who are His." And, "Let everyone who names the name of Christ depart from iniquity!"

2 Timothy 3:9

But they shall proceed no further. For their foolishness shall be plain to all, as theirs also became.

Hebrews 10:39

But we are not of those withdrawing to destruction, but of those who believe to the preserving of the soul.

1 Peter 1:2-5

according to the foreknowledge of God the Father, in sanctification of the Spirit, to obedience and sprinkling of the blood of Jesus Christ. May grace and peace be multiplied to you.

2 Peter 2:20-21

For if they have escaped the pollutions of the world through the full knowledge of the Lord and Savior Jesus Christ, and are again entangled, they have been overcome by these, their last things are worse than the first.

Jude 1:1

Jude, a servant of Jesus Christ, and brother of James, to the ones called in God the Father, having been set apart, and having been kept by Jesus Christ:

Jude 1:19

These are those setting themselves apart, animal-like ones, not having the Spirit.

Treasury of Scripture Knowledge

Summary

They went out from us, but they were not of us; for if they had been of us, they would no doubt have continued with us: but they went out, that they might be made manifest that they were not all of us.

Bible References

Went out

Deuteronomy 13:13
Men, the sons of Belial, have gone out from among you and have drawn away those who live in their city, saying, Let us go and serve other gods, which you have not known,
Psalm 41:9
Even a man, my friend, in whom I trusted, who ate of my bread, has lifted up his heel against me.
Matthew 13:20
But that which was sown on the stony places is this: he who hears the Word and immediately receives it with joy.
Mark 4:5
And another fell on stony ground, where it did not have much earth. And it sprang up at once, due to not having deepness of earth.
Luke 8:13
Those on the rock are the ones who, when they hear, receive the Word with joy. And these have no root, who for a while believe, and in time of temptation fall away.
John 15:2
Every branch in Me that does not bear fruit, He takes away. And every one that bears fruit, He prunes it so that it may bring forth more fruit.
Acts 15:24
Because we have heard that certain ones who went out from us have troubled you with words, unsettling your souls, saying, Be circumcised and keep the law! (to whom we gave no such command);
Acts 20:30
Also men shall arise from your own selves, speaking perverse things in order to draw disciples away after them.
2 Peter 2:20
For if they have escaped the pollutions of the world through the full knowledge of the Lord and Savior Jesus Christ, and are again entangled, they have been overcome by these, their last things are worse than the first.
Jude 1:19
These are those setting themselves apart, animal-like ones, not having the Spirit.

They might

Romans 9:6
Not however that the Word of God has failed, for not all those of Israel are Israel;
Romans 11:5
Even so then, also in this present time a remnant according to the election of grace has come into being.
1 Corinthians 11:19
For there must also be heresies among you, that the approved ones may be revealed among you.
2 Timothy 3:9
But they shall proceed no further. For their foolishness shall be plain to all, as theirs also became.
Hebrews 10:39
But we are not of those withdrawing to destruction, but of those who believe to the preserving of the soul.

General references

Matthew 25:2
And five of them were wise, and five were foolish.
John 10:5
And they will not follow a stranger, but will flee from him, for they do not know the voice of strangers.
1 Timothy 5:15
For some have already turned aside after Satan.