Jude 1:4

For certain men have secretly infiltrated [your ranks]; they are men who had been written about long ago that they should be judged [and condemned] for perverting the unearned favor of our God into [a license for] living unrestrained, indecent lives, and who deny [the identity and work of] our only Master and Lord, Jesus Christ.

Galatians 2:4

For [certain] false brothers, who were secretly brought in to observe us practicing our liberty in Christ Jesus [i.e., by not having Titus circumcised], attempted to place us [back] under the bondage [of Mosaic law keeping].

1 Peter 2:8

[And it also says, Isa. 8:14, that He would be], "A stone that people would stumble over and a rock over which they would trip and fall." The way they stumble is by disobeying the Gospel message. They were destined [though not forced] to do this.

1 John 2:22

Who is the liar? It is the person who denies that Jesus [truly] is the Christ [i.e., God's specially chosen One]. This person is the antichrist [See verse 18]; he is the one who denies [the truth about] the Father and the Son.

2 Timothy 3:6

They are the kind of people who enter homes and influence [morally] weak-willed women, loaded down with sins, [and] led on by all kinds of evil desires.

Matthew 13:25

but while his workers were asleep his enemy came and scattered weed seeds throughout his wheat field and then left.

John 17:3

And this is never ending life; that people may know you [as] the only true God, and Jesus Christ, the One whom you have sent.

Acts 11:23

When he got there and saw how God was favoring the people [with salvation] he was very happy and [stayed on and] encouraged everyone to remain close to the Lord with a heartfelt purpose.

Acts 15:24

We have heard that certain [men] who left here have been upsetting you people and [even] undermining [some people's] spiritual lives by what they have been teaching. This was done without our authorization [or approval].

Romans 6:1-2

What shall we say, then? Should we continue sinning so that more of God's unearned favor will [have to] be shown?

Romans 9:21-22

Or, does not the potter have the right to make what he wants to out of the clay? Can he not make both a beautiful vase and a common pot out of the same lump [of clay]?

Galatians 5:13

For you brothers were called [by God] to enjoy your freedom; but do not use this freedom as an excuse for living a sinful life; instead, use it to render loving service to each other.

Ephesians 4:14

Then we will no longer be [spiritual] babies, tossed back and forth [by waves], and blown around by every wind of [false] teaching, [deceived] by the clever trickery of people using deceptive schemes.

1 Timothy 6:15-16

which God will bring about in its [or, "His"] own time. [For] He is the blessed and only Ruler, the King of kings, and the Lord of lords.

Titus 1:15-16

Everything is pure [i.e., ceremonially acceptable] to the person who is pure [i.e., who has been cleansed by the blood of Christ], but to those who are [spiritually] corrupt, and do not believe [in Christ], nothing is pure, but both their minds and consciences are corrupted. [Note: This statement was intended to remove the physical restrictions imposed by the law of Moses].

Titus 2:11-12

For God's unearned favor has appeared, bringing salvation to all people [i.e., in the coming of Christ].

Hebrews 12:15-16

Look carefully [at how you are living] so that no one falls away from God's unearned favor, and that no "poisonous plant sprouts up" to cause trouble and corrupt many people [Note: This is an analogy from Deut. 29:16-18 being used as a warning against the evil influence of wicked people],

1 Peter 2:16

As servants of God, you should live as free people, but do not use this freedom to cover up your wrongdoing.

1 Peter 4:18

And if people who are trying to do right [i.e., Christians] are saved through [suffering] such difficulties, where will the ungodly and sinful person end up, [if not in hell]?

2 Peter 2:1-3

But just as there were false prophets among the people before, there will also be false teachers among you [Christians]. They will privately teach harmful doctrines that destroy people [spiritually], by even denying [that Jesus is] the Master, [and thereby] destroying themselves quickly.

2 Peter 2:5-6

and if He did not spare the ancient world of Noah's day, when He brought a flood on those ungodly people (though Noah, a preacher of righteousness, and seven other people, were saved from it);

2 Peter 2:10

[This fate will come upon] those people especially who corrupt themselves with physical desires and despise being ruled by others. They are daring, self-willed, and are not afraid to speak against glorious beings [i.e., angels],

2 Peter 2:18-22

[Although] their talk is big, what they say is worthless, and by [offering people] fleshly desires [i.e., sexual gratification], they lead people astray, who are barely escaping from the error of the world.

2 Peter 3:7

But, by means of the same word [of God], the present heavens and earth have been reserved for fire, awaiting the judgment and destruction [by God], along with [its] ungodly people.

Jude 1:15

to bring judgment upon all [such people], and to convict every person of their ungodly behavior, which they have wickedly committed, and of all the evil things that [such] ungodly sinners have spoken against God."

Revelation 15:4

O Lord, who will not fear [you] and honor your name, for only you are holy? [So], all the nations will come and worship in front of you, for your righteous deeds have been revealed."

Treasury of Scripture Knowledge

Summary

For there are certain men crept in unawares, who were before of old ordained to this condemnation, ungodly men, turning the grace of our God into lasciviousness, and denying the only Lord God, and our Lord Jesus Christ.

Bible References

Crept

Matthew 13:25
but while his workers were asleep his enemy came and scattered weed seeds throughout his wheat field and then left.
Acts 15:24
We have heard that certain [men] who left here have been upsetting you people and [even] undermining [some people's] spiritual lives by what they have been teaching. This was done without our authorization [or approval].
Galatians 2:4
For [certain] false brothers, who were secretly brought in to observe us practicing our liberty in Christ Jesus [i.e., by not having Titus circumcised], attempted to place us [back] under the bondage [of Mosaic law keeping].
Ephesians 4:14
Then we will no longer be [spiritual] babies, tossed back and forth [by waves], and blown around by every wind of [false] teaching, [deceived] by the clever trickery of people using deceptive schemes.
2 Timothy 3:6
They are the kind of people who enter homes and influence [morally] weak-willed women, loaded down with sins, [and] led on by all kinds of evil desires.
2 Peter 2:1
But just as there were false prophets among the people before, there will also be false teachers among you [Christians]. They will privately teach harmful doctrines that destroy people [spiritually], by even denying [that Jesus is] the Master, [and thereby] destroying themselves quickly.

Who

Romans 9:21
Or, does not the potter have the right to make what he wants to out of the clay? Can he not make both a beautiful vase and a common pot out of the same lump [of clay]?
1 Peter 2:8
[And it also says, Isa. 8:14, that He would be], "A stone that people would stumble over and a rock over which they would trip and fall." The way they stumble is by disobeying the Gospel message. They were destined [though not forced] to do this.
2 Peter 2:3
And through greedy desires and deceptive words they will exploit you [for evil purposes]. But the judgment that they have had coming for a long time, will not delay, but will eventually awaken [i.e., arrive] to bring destruction upon them.

Turning

Romans 6:1
What shall we say, then? Should we continue sinning so that more of God's unearned favor will [have to] be shown?
Galatians 5:13
For you brothers were called [by God] to enjoy your freedom; but do not use this freedom as an excuse for living a sinful life; instead, use it to render loving service to each other.
Titus 2:11
For God's unearned favor has appeared, bringing salvation to all people [i.e., in the coming of Christ].
Hebrews 12:15
Look carefully [at how you are living] so that no one falls away from God's unearned favor, and that no "poisonous plant sprouts up" to cause trouble and corrupt many people [Note: This is an analogy from Deut. 29:16-18 being used as a warning against the evil influence of wicked people],
1 Peter 2:16
As servants of God, you should live as free people, but do not use this freedom to cover up your wrongdoing.
2 Peter 2:10
[This fate will come upon] those people especially who corrupt themselves with physical desires and despise being ruled by others. They are daring, self-willed, and are not afraid to speak against glorious beings [i.e., angels],

Denying

Titus 1:15
Everything is pure [i.e., ceremonially acceptable] to the person who is pure [i.e., who has been cleansed by the blood of Christ], but to those who are [spiritually] corrupt, and do not believe [in Christ], nothing is pure, but both their minds and consciences are corrupted. [Note: This statement was intended to remove the physical restrictions imposed by the law of Moses].
2 Peter 2:1
But just as there were false prophets among the people before, there will also be false teachers among you [Christians]. They will privately teach harmful doctrines that destroy people [spiritually], by even denying [that Jesus is] the Master, [and thereby] destroying themselves quickly.
1 John 2:22
Who is the liar? It is the person who denies that Jesus [truly] is the Christ [i.e., God's specially chosen One]. This person is the antichrist [See verse 18]; he is the one who denies [the truth about] the Father and the Son.

General references

Matthew 24:11
And many false prophets will appear and will lead many people away [from the truth].
1 Timothy 5:15
For some [young widows] have already turned away [from their commitment to God] to serve Satan.
James 2:19
You believe that there is [only] one God; that is good! Even the demons believe [that], and they shudder [with fear at the thought].