Jude 1:4

For there have stealthily crept in certain men who were of old appointed beforehand for this condemnation, ungodly men, turning the grace of our God into wantonness, and denying the only Sovereign, and our Lord Jesus Christ.

Galatians 2:4

and that because of the false brethren stealthily brought in, who crept in to spy out our liberty which we have in Christ Jesus, that they might bring into bondage;

1 Peter 2:8

and "a stone of stumbling, and a rock to strike against;" even to those who stumble, being disobedient to the word; to which they were also appointed.

1 John 2:22

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

2 Timothy 3:6

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

Matthew 13:25

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

John 17:3

And this is the everlasting life, to know thee, the only true God, and Jesus Christ whom thou didst send.

Acts 11:23

who, when he came, and saw the grace of God, rejoiced, and exhorted all to cleave to the Lord with purpose of heart;

Acts 15:24

Whereas we have heard, that some who went out from us have troubled you with words, subverting your souls, to whom we gave no command;

Romans 6:1-2

What shall we say then? Let us continue in sin, that grace may abound still more?

Romans 9:21-22

Hath not the potter a right out of the same lump of clay to make one vessel for an honorable use, and another for a dishonorable?

Galatians 5:13

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

Ephesians 4:14

that we may no longer be children, tossed to and fro and borne about by every wind of teaching, through the dishonest tricks of men, and their cunning in the wily arts of error;

1 Timothy 6:15-16

which in his 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 the defiled and unbelieving nothing is pure, but both their mind and conscience are defiled.

Titus 2:11-12

For the grace of God, that bringeth salvation to all men, was manifested,

Hebrews 12:15-16

looking diligently, lest any one come short of the grace of God; lest any root of bitterness springing up trouble you, and the many be thereby defiled;

1 Peter 2:16

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

1 Peter 4:18

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

2 Peter 2:1-3

But there arose false prophets also among the people, as there will be false teachers among you also, who will stealthily bring in destructive factions, even denying the Lord that bought them; bringing upon themselves swift destruction.

2 Peter 2:5-6

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

2 Peter 2:10

but chiefly those who walk after the flesh in the lust of uncleanness, and despise dominion. Presumptuous, selfwilled, they are not afraid to rail at dignities;

2 Peter 2:18-22

For speaking great swelling words of vanity, they allure in the lusts of the flesh, by dissolute ways, such as were in some measure escaping from those who live in error;

2 Peter 3:7

but the present heavens and the present earth are by his word kept in store, reserved for fire against the day of judgment and the perdition of ungodly men.

Jude 1:15

to execute judgment upon all, and to convict all the ungodly among them of all the deeds of their ungodliness which they committed; and of all the hard things which ungodly sinners spoke against him."

Revelation 15:4

who shall not fear, O Lord, and glorify thy name? for thou only art holy; for all nations shall come and worship before thee, because 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 went away.
Acts 15:24
Whereas we have heard, that some who went out from us have troubled you with words, subverting your souls, to whom we gave no command;
Galatians 2:4
and that because of the false brethren stealthily brought in, who crept in to spy out our liberty which we have in Christ Jesus, that they might bring into bondage;
Ephesians 4:14
that we may no longer be children, tossed to and fro and borne about by every wind of teaching, through the dishonest tricks of men, and their cunning in the wily arts of error;
2 Timothy 3:6
For of these are they who creep into houses, and lead 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 there will be false teachers among you also, who will stealthily bring in destructive factions, even denying the Lord that bought them; bringing upon themselves swift destruction.

Who

Romans 9:21
Hath not the potter a right out of the same lump of clay to make one vessel for an honorable use, and another for a dishonorable?
1 Peter 2:8
and "a stone of stumbling, and a rock to strike against;" even to those who stumble, being disobedient to the word; to which they were also appointed.
2 Peter 2:3
and in covetousness will they with feigned words make merchandise of you; for whom the judgment long ago ordained lingereth not, and their destruction slumbereth not.

Turning

Romans 6:1
What shall we say then? Let us continue in sin, that grace may abound still more?
Galatians 5:13
For ye, brethren, were called to liberty; only use not your liberty for an occasion to the flesh, but by your love serve one another.
Titus 2:11
For the grace of God, that bringeth salvation to all men, was manifested,
Hebrews 12:15
looking diligently, lest any one come short of the grace of God; lest any root of bitterness springing up trouble you, and the many be thereby defiled;
1 Peter 2:16
as free, and not using your freedom for a cloak of wickedness, but as servants of God.
2 Peter 2:10
but chiefly those who walk after the flesh in the lust of uncleanness, and despise dominion. Presumptuous, selfwilled, they are not afraid to rail at dignities;

Denying

Titus 1:15
To the pure all things are pure; but to the defiled and unbelieving nothing is pure, but both their mind and conscience are defiled.
2 Peter 2:1
But there arose false prophets also among the people, as there will be false teachers among you also, who will stealthily bring in destructive factions, even denying the Lord 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, who denieth the Father and the Son.

General references

Matthew 24:11
And many false prophets will arise, and will deceive many.
1 Timothy 5:15
For some have already turned aside after Satan.
James 2:19
Thou believest that God is one; thou doest well; the demons also believe, and tremble.