Jude 1:4

For certain men have 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.

Galatians 2:4

And that because of false brethren unawares brought in, who came in privately to spy out our liberty which we have in Christ Jesus, that they might bring us into bondage:

1 Peter 2:8

And a stone of stumbling, and a rock of offense, even to them who stumble at the word, being disobedient: to which also they were appointed.

1 John 2:22

Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son.

2 Timothy 3:6

For of this sort are they who creep into houses, and lead captive silly women laden with sins, led away with divers lusts;

2 Samuel 22:5

When the waves of death compassed me, the floods of ungodly-men made me afraid;

Psalm 1:1

Blessed is the man that walketh not in the counsel of the ungodly, nor standeth in the way of sinners, nor sitteth in the seat of scoffers.

Psalm 62:2

He only is my rock and my salvation; he is my defense; I shall not be greatly moved.

Matthew 13:25

But while men slept, his enemy came and sowed tares among the wheat, and departed.

John 17:3

And this is life eternal, that they may know thee the only true God, and Jesus Christ whom thou hast sent.

Acts 11:23

Who, when he came, and had seen the grace of God, was glad, and exhorted them all that with purpose of heart they would cleave to the Lord.

Acts 15:24

Forasmuch as we have heard, that certain who 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 6:1-2

What shall we say then? Shall we continue in sin, that grace may abound?

Romans 9:21-22

Hath not the potter power over the clay of the same lump to make one vessel to honor, and another to dishonor?

Galatians 5:13

For, brethren, ye have been called to liberty; only use not liberty for an occasion to the flesh, but by love serve one another.

Ephesians 4:14

That we henceforth be no more children, tossed to and fro, and carried about with every wind of doctrine, by the sleight of men, and cunning craftiness, by which they lie in wait to deceive:

1 Timothy 6:15-16

Which in his times he will show who is the blessed and only Potentate, the King of kings, and Lord of lords;

Titus 1:15-16

To the pure all things are pure: but to them that are defiled and unbelieving is nothing pure; but even their mind and conscience is defiled.

Titus 2:11-12

For the grace of God that bringeth salvation hath appeared to all men,

Hebrews 12:15-16

Looking diligently, lest any man fail of the grace of God; lest any root of bitterness springing up, trouble you, and by it many be defiled;

1 Peter 2:16

As free, and not using your liberty for a cloke of maliciousness, but as the servants of God.

1 Peter 4:18

And if the righteous is scarcely saved, where will the ungodly and the sinner appear?

2 Peter 2:1-3

But there were false prophets also among the people, even as there will be false teachers among you, who will privately bring in damnable heresies, even denying the Lord that bought them, and bring upon themselves swift destruction.

2 Peter 2:5-6

And spared not the old world, but saved Noah the eighth person, a preacher of righteousness, bringing the flood upon the world of the ungodly;

2 Peter 2:10

But chiefly them that walk after the flesh in the lust of uncleanness, and despise government. Presumptuous are they, self-willed; they are not afraid to speak evil of dignities.

2 Peter 2:18-22

For when they speak great swelling words of vanity, they allure through the lusts of the flesh, through much wantonness, those that had quite escaped from them who live in error.

2 Peter 3:7

But the heavens and the earth, which are now, by the same word are kept in store, reserved to fire against the day of judgment and perdition of ungodly men.

Jude 1:15

To execute judgment upon all, and to convict all that are ungodly among them of all their ungodly deeds which they have impiously committed, and of all their hard speeches which ungodly sinners have spoken against him.

Revelation 15:4

Who shall not fear thee, O Lord, and glorify thy name? for thou only art holy: for all nations shall come and worship before thee; for thy judgments are made manifest.

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 men slept, his enemy came and sowed tares among the wheat, and departed.
Acts 15:24
Forasmuch as we have heard, that certain who 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:
Galatians 2:4
And that because of false brethren unawares brought in, who came in privately to spy out our liberty which we have in Christ Jesus, that they might bring us into bondage:
Ephesians 4:14
That we henceforth be no more children, tossed to and fro, and carried about with every wind of doctrine, by the sleight of men, and cunning craftiness, by which they lie in wait to deceive:
2 Timothy 3:6
For of this sort are they who creep into houses, and lead captive silly women laden with sins, led away with divers lusts;
2 Peter 2:1
But there were false prophets also among the people, even as there will be false teachers among you, who will privately bring in damnable heresies, even denying the Lord that bought them, and bring upon themselves swift destruction.

Who

Romans 9:21
Hath not the potter power over the clay of the same lump to make one vessel to honor, and another to dishonor?
1 Peter 2:8
And a stone of stumbling, and a rock of offense, even to them who stumble at the word, being disobedient: to which also they were appointed.
2 Peter 2:3
And through covetousness they will with feigned words make merchandise of you: whose judgment now of a long time lingereth not, and their damnation slumbereth not.

Turning

Romans 6:1
What shall we say then? Shall we continue in sin, that grace may abound?
Galatians 5:13
For, brethren, ye have been called to liberty; only use not liberty for an occasion to the flesh, but by love serve one another.
Titus 2:11
For the grace of God that bringeth salvation hath appeared to all men,
Hebrews 12:15
Looking diligently, lest any man fail of the grace of God; lest any root of bitterness springing up, trouble you, and by it many be defiled;
1 Peter 2:16
As free, and not using your liberty for a cloke of maliciousness, but as the servants of God.
2 Peter 2:10
But chiefly them that walk after the flesh in the lust of uncleanness, and despise government. Presumptuous are they, self-willed; they are not afraid to speak evil of dignities.

Denying

Titus 1:15
To the pure all things are pure: but to them that are defiled and unbelieving is nothing pure; but even their mind and conscience is defiled.
2 Peter 2:1
But there were false prophets also among the people, even as there will be false teachers among you, who will privately bring in damnable heresies, even denying the Lord that bought them, and bring upon themselves swift destruction.
1 John 2:22
Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son.

General references

Leviticus 15:8
And if he that hath the issue shall spit upon him that is clean; then he shall wash his clothes, and bathe himself in water, and be unclean until the evening.
Matthew 24:11
And many false prophets will rise, and will deceive many.
1 Timothy 5:15
For some are already turned aside after Satan.
James 2:19
Thou believest that there is one God; thou doest well: the demons also believe, and tremble.