Jude 1:4

For there are certain men crept in privily, even they who were of old written of beforehand unto this condemnation, ungodly men, turning the grace of our God into lasciviousness, and denying our only Master and Lord, Jesus Christ.

Galatians 2:4

and that because of the false brethren privily brought in, who came in privily 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 offence; for they stumble at the word, being disobedient: whereunto also they were appointed.

1 John 2:22

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

2 Timothy 3:6

For of these are they that creep into houses, and take captive silly women laden with sins, led away by divers lusts,

2 Samuel 22:5

For the waves of death compassed me; The floods of ungodliness made me afraid:

Psalm 1:1

Blessed is the man that walketh not in the counsel of the wicked, 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 high tower; I shall not be greatly moved.

Matthew 13:25

but while men slept, his enemy came and sowed tares also among the wheat, and went away.

John 17:3

And this is life eternal, that they should know thee the only true God, and him whom thou didst send, even Jesus Christ.

Acts 11:23

who, when he was come, and had seen the grace of God, was glad; and he exhorted them all, that with purpose of heart they would cleave unto 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; to whom we gave no commandment;

Romans 6:1-2

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

Romans 9:21-22

Or hath not the potter a right over the clay, from the same lump to make one part a vessel unto honor, and another unto dishonor?

Galatians 5:13

For ye, brethren, were called for freedom; only use not your freedom for an occasion to the flesh, but through love be servants one to another.

Ephesians 4:14

that we may be no longer children, tossed to and fro and carried about with every wind of doctrine, by the sleight of men, in craftiness, after the wiles of error;

1 Timothy 6:15-16

which in its own times he shall 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 nothing is pure; but both their mind and their conscience are defiled.

Titus 2:11-12

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

Hebrews 12:15-16

looking carefully lest there be any man that falleth short of the grace of God; lest any root of bitterness springing up trouble you , and thereby the many be defiled;

1 Peter 2:16

as free, and not using your freedom for a cloak of wickedness, but as bondservants of God.

1 Peter 4:18

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

2 Peter 2:1-3

But there arose false prophets also among the people, as among you also there shall be false teachers, who shall privily bring in destructive heresies, denying even the Master that bought them, bringing upon themselves swift destruction.

2 Peter 2:5-6

and spared not the ancient world, but preserved Noah with seven others, a preacher of righteousness, when he brought a flood upon the world of the ungodly;

2 Peter 2:10

but chiefly them that walk after the flesh in the lust of defilement, and despise dominion. Daring, self-willed, they tremble not to rail at dignities:

2 Peter 2:18-22

For, uttering great swelling words of vanity, they entice in the lusts of the flesh, by lasciviousness, those who are just escaping from them that live in error;

2 Peter 3:7

but the heavens that now are, and the earth, by the same word have been stored up for fire, being reserved against the day of judgment and destruction of ungodly men.

Jude 1:15

to execute judgment upon all, and to convict all the ungodly of all their works of ungodliness which they have ungodly wrought, and of all the hard things which ungodly sinners have spoken against him.

Revelation 15:4

Who shall not fear, O Lord, and glorify thy name? for thou only art holy; for all the nations shall come and worship before thee; for thy righteous acts have been 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 also among the wheat, and went away.
Acts 15:24
Forasmuch as we have heard that certain who went out from us have troubled you with words, subverting your souls; to whom we gave no commandment;
Galatians 2:4
and that because of the false brethren privily brought in, who came in privily to spy out our liberty which we have in Christ Jesus, that they might bring us into bondage:
Ephesians 4:14
that we may be no longer children, tossed to and fro and carried about with every wind of doctrine, by the sleight of men, in craftiness, after the wiles of error;
2 Timothy 3:6
For of these are they that creep into houses, and take captive silly women laden with sins, led away by divers lusts,
2 Peter 2:1
But there arose false prophets also among the people, as among you also there shall be false teachers, who shall privily bring in destructive heresies, denying even the Master that bought them, bringing upon themselves swift destruction.

Who

Romans 9:21
Or hath not the potter a right over the clay, from the same lump to make one part a vessel unto honor, and another unto dishonor?
1 Peter 2:8
and, A stone of stumbling, and a rock of offence; for they stumble at the word, being disobedient: whereunto also they were appointed.
2 Peter 2:3
And in covetousness shall they with feigned words make merchandise of you: whose sentence now from of old lingereth not, and their destruction slumbereth not.

Turning

Romans 6:1
What shall we say then? Shall we continue in sin, that grace may abound?
Galatians 5:13
For ye, brethren, were called for freedom; only use not your freedom for an occasion to the flesh, but through love be servants one to another.
Titus 2:11
For the grace of God hath appeared, bringing salvation to all men,
Hebrews 12:15
looking carefully lest there be any man that falleth short of the grace of God; lest any root of bitterness springing up trouble you , and thereby the many be defiled;
1 Peter 2:16
as free, and not using your freedom for a cloak of wickedness, but as bondservants of God.
2 Peter 2:10
but chiefly them that walk after the flesh in the lust of defilement, and despise dominion. Daring, self-willed, they tremble not to rail at dignities:

Denying

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

General references

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

American Standard Version Public Domain