1 John 2:19

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.

Acts 20:30

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

1 Corinthians 11:19

For there must be also heresies among you, that they which are approved may be made manifest among you.

Deuteronomy 13:13

Certain men, the children of Belial, are gone out from among you, and have withdrawn the inhabitants of their city, saying, Let us go and serve other gods, which ye have not known;

Job 17:9

The righteous also shall hold on his way, and he that hath clean hands shall be stronger and stronger.

Psalm 37:28

For the LORD loveth judgment, and forsaketh not his saints; they are preserved for ever: but the seed of the wicked shall be cut off.

Psalm 41:9

Yea, mine own familiar friend, in whom I trusted, which did eat of my bread, hath lifted up his heel against me.

Psalm 125:1-2

{A Song of degrees.} They that trust in the LORD shall be as mount Zion, which cannot be removed, but abideth for ever.

Jeremiah 32:38-40

And they shall be my people, and I will be their God:

Matthew 13:20-21

But he that received the seed into stony places, the same is he that heareth the word, and anon with joy receiveth it;

Matthew 24:24

For there shall arise false Christs, and false prophets, and shall shew great signs and wonders; insomuch that, if it were possible, they shall deceive the very elect.

Mark 4:5-6

And some fell on stony ground, where it had not much earth; and immediately it sprang up, because it had no depth of earth:

Mark 4:16-17

And these are they likewise which are sown on stony ground; who, when they have heard the word, immediately receive it with gladness;

Mark 13:22

For false Christs and false prophets shall rise, and shall shew signs and wonders, to seduce, if it were possible, even the elect.

Luke 8:13

They on the rock are they, which, when they hear, receive the word with joy; and these have no root, which for a while believe, and in time of temptation fall away.

John 4:14

But whosoever drinketh 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 giveth me shall come to me; and him that cometh to me I will in no wise cast out.

John 10:28-30

And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand.

John 15:2

Every branch in me that beareth not fruit he taketh away: and every branch that beareth fruit, he purgeth it, that it may bring forth more fruit.

Acts 15:24

Forasmuch as we have heard, that certain which went out from us have troubled you with words, subverting your souls, saying, Ye must be circumcised, and keep the law: to whom we gave no such commandment:

Romans 9:6

Not as though the word of God hath taken none effect. For they are not all Israel, which are of Israel:

Romans 11:5-6

Even so then at this present time also there is a remnant according to the election of grace.

2 Timothy 2:10

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

2 Timothy 2:19

Nevertheless the foundation of God standeth sure, having this seal, The Lord knoweth them that are his. And, Let every one that nameth the name of Christ depart from iniquity.

2 Timothy 3:9

But they shall proceed no further: for their folly shall be manifest unto all men, as theirs also was.

Hebrews 10:39

But we are not of them who draw back unto perdition; but of them that believe to the saving of the soul.

1 Peter 1:2-5

Elect according to the foreknowledge of God the Father, through sanctification of the Spirit, unto obedience and sprinkling of the blood of Jesus Christ: Grace unto you, and peace, be multiplied.

2 Peter 2:20-21

For if after they have escaped the pollutions of the world through the knowledge of the Lord and Saviour Jesus Christ, they are again entangled therein, and overcome, the latter end is worse with them than the beginning.

Jude 1:1

Jude, the servant of Jesus Christ, and brother of James, to them that are sanctified by God the Father, and preserved in Jesus Christ, and called:

Jude 1:19

These be they who separate themselves, sensual, having not 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
Certain men, the children of Belial, are gone out from among you, and have withdrawn the inhabitants of their city, saying, Let us go and serve other gods, which ye have not known;
Psalm 41:9
Yea, mine own familiar friend, in whom I trusted, which did eat of my bread, hath lifted up his heel against me.
Matthew 13:20
But he that received the seed into stony places, the same is he that heareth the word, and anon with joy receiveth it;
Mark 4:5
And some fell on stony ground, where it had not much earth; and immediately it sprang up, because it had no depth of earth:
Luke 8:13
They on the rock are they, which, when they hear, receive the word with joy; and these have no root, which for a while believe, and in time of temptation fall away.
John 15:2
Every branch in me that beareth not fruit he taketh away: and every branch that beareth fruit, he purgeth it, that it may bring forth more fruit.
Acts 15:24
Forasmuch as we have heard, that certain which went out from us have troubled you with words, subverting your souls, saying, Ye must be circumcised, and keep the law: to whom we gave no such commandment:
Acts 20:30
Also of your own selves shall men arise, speaking perverse things, to draw away disciples after them.
2 Peter 2:20
For if after they have escaped the pollutions of the world through the knowledge of the Lord and Saviour Jesus Christ, they are again entangled therein, and overcome, the latter end is worse with them than the beginning.
Jude 1:19
These be they who separate themselves, sensual, having not the Spirit.

They might

Romans 9:6
Not as though the word of God hath taken none effect. For they are not all Israel, which are of Israel:
Romans 11:5
Even so then at this present time also there is a remnant according to the election of grace.
1 Corinthians 11:19
For there must be also heresies among you, that they which are approved may be made manifest among you.
2 Timothy 3:9
But they shall proceed no further: for their folly shall be manifest unto all men, as theirs also was.
Hebrews 10:39
But we are not of them who draw back unto perdition; but of them that believe to the saving of the soul.

General references

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

King James Version Public Domain