1 John 2:19

They went out from us, but they were not of us; for if they had been of us, they would have remained with us. But [they went out], in order that it might be shown that all of them are not of us.

Acts 20:30

And from among you yourselves men will arise, speaking {perversions of the truth} in order to draw away the disciples after them.

1 Corinthians 11:19

For indeed it is necessary that there be factions among you, in order that those who are approved may become evident among you.

Deuteronomy 13:13

{worthless men} have gone out from your midst and have seduced the inhabitants of their town, {saying}, 'Let us go and serve other gods!' whom you have not known,

Job 17:9

But [the] righteous holds on to his way, and {he who has clean hands} increases in strength.

Psalm 37:28

For Yahweh loves justice and will not forsake his faithful ones. They are protected forever. But [the] children of [the] wicked will be cut off.

Psalm 41:9

Even {my close friend}, whom I trusted, [who] ate my bread, has lifted [his] heel against me.

Psalm 125:1-2

Those who trust in Yahweh [are] like Mount Zion, which cannot be moved, [but] abides forever.

Jeremiah 32:38-40

And they will be for me a people, and I will be for them God.

Matthew 13:20-21

And what was sown on the rocky ground--this is the one who hears the word and immediately receives it with joy.

Matthew 24:24

For false messiahs and false prophets will appear, and will produce great signs and wonders in order to deceive, if possible, even the elect.

Mark 4:5-6

And other [seed] fell on the rocky ground where it did not have much soil, and it sprang up at once, because it did not have [any] depth of soil.

Mark 4:16-17

And these are like the ones sown on the rocky ground, who whenever they hear the word immediately receive it with joy.

Mark 13:22

For false messiahs and false prophets will appear, and will produce signs and wonders in order to mislead, if possible, the elect.

Luke 8:13

And those on the rock [are those] who receive the word with joy when they hear [it], and these do not have [enough] root, who believe for a time and in a time of testing fall away.

John 4:14

But whoever drinks of this water which I will give to him will never be thirsty for eternity, but the water which I will give to him will become in him a well of water springing up to eternal life."

John 6:37-39

Everyone whom the Father gives to me will come to me, and the one who comes to me I will never throw out,

John 10:28-30

And I give them eternal life, and they will never perish {forever}, and no one will seize them out of my hand.

John 15:2

Every branch that does not bear fruit in me, he removes it, and every [branch] that bears fruit, he prunes it in order that it may bear more fruit.

Acts 15:24

Because we have heard that some have gone out from among us--to whom we gave no orders--[and] have thrown you into confusion by words upsetting your {minds},

Romans 9:6

But [it is] not as if the word of God had failed. For not all those [who are descended] from Israel [are truly] Israel,

Romans 11:5-6

So in this way also at the present time, there is a remnant {selected by grace}.

2 Timothy 2:10

Because of this, I endure all [things] for the sake of the chosen, in order that they also may obtain salvation [which is] in Christ Jesus with eternal glory.

2 Timothy 2:19

However, the solid foundation of God stands firm, having this seal: "The Lord knows those who are his," and "Everyone who names the name of the Lord must abstain from unrighteousness."

2 Timothy 3:9

But they will not progress to a greater extent, for their folly will be quite evident to everyone, as also the [folly] of those [two] was.

Hebrews 10:39

But we are not among those who shrink back to destruction, but among those who have faith to the preservation of [our] souls.

1 Peter 1:2-5

according to the foreknowledge of God the Father, by the sanctification of the Spirit, for obedience and [for] sprinkling with the blood of Jesus Christ. May grace and peace be multiplied to you.

2 Peter 2:20-21

For if, [after they] have escaped from the defilements of the world through the knowledge of the Lord and Savior Jesus Christ, and they are again entangled in these [things] [and] succumb to [them], the last [state] has become worse for them than the first.

Jude 1:1

Jude, a slave of Jesus Christ and brother of James, to [those who are] called, loved in God the Father and kept for Jesus Christ.

Jude 1:19

These are the ones who cause divisions, worldly, 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
{worthless men} have gone out from your midst and have seduced the inhabitants of their town, {saying}, 'Let us go and serve other gods!' whom you have not known,
Psalm 41:9
Even {my close friend}, whom I trusted, [who] ate my bread, has lifted [his] heel against me.
Matthew 13:20
And what was sown on the rocky ground--this is the one who hears the word and immediately receives it with joy.
Mark 4:5
And other [seed] fell on the rocky ground where it did not have much soil, and it sprang up at once, because it did not have [any] depth of soil.
Luke 8:13
And those on the rock [are those] who receive the word with joy when they hear [it], and these do not have [enough] root, who believe for a time and in a time of testing fall away.
John 15:2
Every branch that does not bear fruit in me, he removes it, and every [branch] that bears fruit, he prunes it in order that it may bear more fruit.
Acts 15:24
Because we have heard that some have gone out from among us--to whom we gave no orders--[and] have thrown you into confusion by words upsetting your {minds},
Acts 20:30
And from among you yourselves men will arise, speaking {perversions of the truth} in order to draw away the disciples after them.
2 Peter 2:20
For if, [after they] have escaped from the defilements of the world through the knowledge of the Lord and Savior Jesus Christ, and they are again entangled in these [things] [and] succumb to [them], the last [state] has become worse for them than the first.
Jude 1:19
These are the ones who cause divisions, worldly, not having the Spirit.

They might

Romans 9:6
But [it is] not as if the word of God had failed. For not all those [who are descended] from Israel [are truly] Israel,
Romans 11:5
So in this way also at the present time, there is a remnant {selected by grace}.
1 Corinthians 11:19
For indeed it is necessary that there be factions among you, in order that those who are approved may become evident among you.
2 Timothy 3:9
But they will not progress to a greater extent, for their folly will be quite evident to everyone, as also the [folly] of those [two] was.
Hebrews 10:39
But we are not among those who shrink back to destruction, but among those who have faith to the preservation of [our] souls.

General references

Matthew 25:2
Now five of them were foolish and five [were] wise.
John 10:5
And they will never follow a stranger, but will flee from him, because they do not know the voice of strangers."
1 Timothy 5:15
For already some have turned away [and followed] after Satan.