New Revised Standard Version
For certain intruders have stolen in among you, people who long ago were designated for this condemnation as ungodly, who pervert the grace of our God into licentiousness and deny our only Master and Lord, Jesus Christ.

Contemporary English Version
Some godless people have sneaked in among us and are saying, "God treats us much better than we deserve, and so it is all right to be immoral." They even deny we must obey Jesus Christ as our only Master and Lord. But long ago the Scriptures warned that these godless people were doomed.

New American Bible
For there have been some intruders, who long ago were designated for this condemnation, godless persons, who pervert the grace of our God into licentiousness and who deny our only Master and Lord, Jesus Christ.

Douay-Rheims Bible
For certain men are secretly entered in (who were written of long ago unto this judgment), ungodly men, turning the grace of our Lord God into riotousness and denying the only sovereign Ruler and our Lord Jesus Christ.

For certain men are secretly entered in (who were written of long ago unto this judgment), ungodly men, turning the grace of our Lord God into riotousness and denying the only sovereign Ruler and our Lord Jesus Christ.

crept.

Matthew 13:25 But while men were asleep, his enemy came and oversowed cockle among the wheat and went his way.

Acts 15:24 Forasmuch as we have heard that some going out from us have troubled you with words, subverting your souls, to whom we gave no commandment:

Galatians 2:4 But because of false brethren unawares brought in, who came in privately to spy our liberty which we have in Christ Jesus, that they might bring us into servitude.

Ephesians 4:14 That henceforth we be no more children tossed to and fro and carried about with every wind of doctrine, by the wickedness of men, by cunning craftiness by which they lie in wait to deceive.

2 Timothy 3:6 For of these sort are they who creep into houses and lead captive silly women laden with sins, who are led away with divers desires:

2 Peter 2:1,2 But there were also false prophets among the people, even as there shall be among you lying teachers who shall bring in sects of perdition and deny the Lord who bought them: bringing upon themselves swift destruction. . . .

who.

Romans 9:21,22 Or hath not the potter power over the clay, of the same lump, to make one vessel unto honour and another unto dishonour? . . .

1 Peter 2:8 And a stone of stumbling and a rock of scandal, to them who stumble at the word, neither do believe, whereunto also they are set.

2 Peter 2:3 And through covetousness shall they with feigned words make merchandise of you. Whose judgment now of a long time lingereth not: and their perdition slumbereth not.

ungodly.

Jude 1:15 To execute judgment upon all and to reprove all the ungodly for all the works of their ungodliness, whereby they have done ungodly: and for all the hard things which ungodly sinners have spoken against God.

2 Samuel 22:5 For the pangs of death have surrounded me: the floods of Belial have made me afraid.

Psalm 1:1 Blessed is the man who hath not walked in the counsel of the ungodly, nor stood in the way of sinners, nor sat in the chair of pestilence:

1 Peter 4:18 And if the just man shall scarcely be saved, where shall the ungodly and the sinner appear?

2 Peter 2:5,6 And spared not the original world, but preserved Noe, the eighth person, the preacher of justice, bringing in the flood upon the world of the ungodly. . . .

2 Peter 3:7 But the heavens and the earth which are now, by the same word are kept in store, reserved unto fire against the day of judgment and perdition of the ungodly men.

turning.

Romans 6:1,2 What shall we say, then? Shall we continue in sin, that grace may abound? . . .

Galatians 5:13 For you, brethren, have been called unto liberty. Only make not liberty an occasion to the flesh: but by charity of the spirit serve one another.

Titus 2:11,12 For the grace of God our Saviour hath appeared to all men: . . .

Hebrews 12:15,16 Looking diligently, lest any man be wanting to the grace of God: lest any root of bitterness springing up do hinder and by it many be defiled: . . .

1 Peter 2:16 As free and not as making liberty a cloak for malice, but as the servants of God.

2 Peter 2:10,18-22 And especially them who walk after the flesh in the lust of uncleanness and despise government: audacious, self willed, they fear not to bring in sects, blaspheming. . . .

denying.

Titus 1:15,16 All things are clean to the clean: but to them that are defiled and to unbelievers, nothing is clean: but both their mind and their conscience are defiled. . . .

2 Peter 2:1 But there were also false prophets among the people, even as there shall be among you lying teachers who shall bring in sects of perdition and deny the Lord who bought them: bringing upon themselves swift destruction.

1 John 2:22 Who is a liar, but he who denieth that Jesus is the Christ? This is Antichrist, who denieth the Father and the Son.

only.

Psalm 62:2 For he is my God and my saviour: he is my protector, I shall be moved no more.

John 17:3 Now this is eternal life: That they may know thee, the only true God, and Jesus Christ, whom thou hast sent.

1 Timothy 6:15,16 Which in his times he shall shew, who is the Blessed and only Mighty, the King of kings and Lord of lords: . . .

Revelation 15:4 Who shall not fear thee, O Lord, and magnify thy name? For thou only art holy. For all nations shall come and shall adore in thy sight, because thy judgments are manifest.