Jude 1:4

For certain men have slipped in stealthily, who were designated long ago for this condemnation, ungodly ones, who change the grace of our God into licentiousness and who deny our only Master and Lord Jesus Christ.

Galatians 2:4

Now [this was] because of the false brothers secretly brought in, who slipped in to spy out our freedom that we have in Christ Jesus, in order that they might enslave us,

1 Peter 2:8

and "A stone of stumbling and a rock of offense," who stumble [because they] disobey the word to which also they were consigned.

1 John 2:22

Who is the liar except the one who denies that Jesus is the Christ? This person is the antichrist, the one who denies the Father and the Son.

2 Timothy 3:6

For from these are those who slip into houses and captivate foolish women loaded down with sins, led by various kinds of desires,

2 Samuel 22:5

For the breaker waves of death engulfed me; the currents of chaos overwhelmed me.

Psalm 1:1

Blessed is the man who does not walk in the advice of [the] wicked; nor does he stand in [the] way of sinners; nor does he sit in [the] assembly of mockers.

Psalm 62:2

Only he [is] my rock and my salvation, my [high] stronghold; I shall not be greatly shaken.

Matthew 13:25

But while his people were sleeping, his enemy came and sowed darnel in the midst of the wheat and went away.

John 17:3

Now this is eternal life: that they know you, the only true God, and Jesus Christ, whom you have sent.

Acts 11:23

who, [when he] arrived and saw the grace of God, rejoiced and encouraged [them] all to remain true to the Lord with {devoted hearts},

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 6:1-2

What therefore shall we say? Shall we continue in sin, in order that grace may increase?

Romans 9:21-22

Or does the potter not have authority over the clay, to make from the same lump a vessel that [is] for {honorable use} and [one] that [is] for {ordinary use}?

Galatians 5:13

For you were called to freedom, brothers. Only do not let your freedom [become] an opportunity for the flesh, but through love serve one another.

Ephesians 4:14

so that we may no longer be infants, tossed about by waves and carried about by every wind of teaching, by the trickery of people, by craftiness with reference to the scheming of deceit.

1 Timothy 6:15-16

which he will make known in his own time, the blessed and only Sovereign, the King of those who reign as kings and Lord of those who rule as lords,

Titus 1:15-16

To the pure all [things] [are] pure, but to those who are defiled and unbelieving nothing [is] pure, but both their mind and conscience are defiled.

Titus 2:11-12

For the grace of God has appeared, bringing salvation to all people,

Hebrews 12:15-16

Take care [that] no one falls short of the grace of God; [that] no one growing up [like] a root of bitterness causes trouble, and by it many become defiled;

1 Peter 2:16

[Live] as free [persons], and not using your freedom as a covering for evil, but as slaves of God.

1 Peter 4:18

And if the righteous are saved with difficulty, {what will become of the ungodly and the sinner}?

2 Peter 2:1-3

But there were also false prophets among the people, as there will be false teachers among you also, who will bring in {destructive heresies}, even denying the Master who bought them, [thus] bringing on themselves swift destruction.

2 Peter 2:5-6

and did not spare the ancient world, but preserved Noah, a proclaimer of righteousness, {and seven others} [when he] brought a flood on the world of the ungodly,

2 Peter 2:10

and especially those who go after the flesh in defiling lust and who despise authority. Bold [and] arrogant, they do not tremble in awe [as they] blaspheme majestic beings,

2 Peter 2:18-22

{For by speaking high-sounding but empty words}, they entice with desires of the flesh [and] with licentiousness those who are scarcely escaping from those who live in error,

2 Peter 3:7

But by the same word the present heavens and earth are reserved for fire, being kept for the day of judgment and destruction of ungodly people.

Jude 1:15

to execute judgment against all, and to convict all the ungodly concerning all their ungodly deeds that they have committed in an ungodly way, and concerning all the harsh things that ungodly sinners have spoken against him.

Revelation 15:4

Who would never fear, Lord, and glorify your name? For only you [are] holy, because all the nations will come and worship before you, because 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 people were sleeping, his enemy came and sowed darnel in the midst of the wheat and went away.
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},
Galatians 2:4
Now [this was] because of the false brothers secretly brought in, who slipped in to spy out our freedom that we have in Christ Jesus, in order that they might enslave us,
Ephesians 4:14
so that we may no longer be infants, tossed about by waves and carried about by every wind of teaching, by the trickery of people, by craftiness with reference to the scheming of deceit.
2 Timothy 3:6
For from these are those who slip into houses and captivate foolish women loaded down with sins, led by various kinds of desires,
2 Peter 2:1
But there were also false prophets among the people, as there will be false teachers among you also, who will bring in {destructive heresies}, even denying the Master who bought them, [thus] bringing on themselves swift destruction.

Who

Romans 9:21
Or does the potter not have authority over the clay, to make from the same lump a vessel that [is] for {honorable use} and [one] that [is] for {ordinary use}?
1 Peter 2:8
and "A stone of stumbling and a rock of offense," who stumble [because they] disobey the word to which also they were consigned.
2 Peter 2:3
And in greediness they will exploit you with false words, whose condemnation [from] long ago is not idle, and their destruction is not asleep.

Turning

Romans 6:1
What therefore shall we say? Shall we continue in sin, in order that grace may increase?
Galatians 5:13
For you were called to freedom, brothers. Only do not let your freedom [become] an opportunity for the flesh, but through love serve one another.
Titus 2:11
For the grace of God has appeared, bringing salvation to all people,
Hebrews 12:15
Take care [that] no one falls short of the grace of God; [that] no one growing up [like] a root of bitterness causes trouble, and by it many become defiled;
1 Peter 2:16
[Live] as free [persons], and not using your freedom as a covering for evil, but as slaves of God.
2 Peter 2:10
and especially those who go after the flesh in defiling lust and who despise authority. Bold [and] arrogant, they do not tremble in awe [as they] blaspheme majestic beings,

Denying

Titus 1:15
To the pure all [things] [are] pure, but to those who are defiled and unbelieving nothing [is] pure, but both their mind and conscience are defiled.
2 Peter 2:1
But there were also false prophets among the people, as there will be false teachers among you also, who will bring in {destructive heresies}, even denying the Master who bought them, [thus] bringing on themselves swift destruction.
1 John 2:22
Who is the liar except the one who denies that Jesus is the Christ? This person is the antichrist, the one who denies the Father and the Son.

General references

Leviticus 15:8
And if the person who discharges spits on [one who is] clean, then that one shall wash is garments, and he shall wash [himself] with water, and he shall be unclean until the evening.
Matthew 24:11
and many false prophets will appear and will deceive many,
1 Timothy 5:15
For already some have turned away [and followed] after Satan.
James 2:19
You believe that God is one; you do well. Even the demons believe, and shudder!