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

For many deceivers have entered into the world, who confess not that Jesus Christ is come in the flesh. This is a deceiver, and an antichrist.

And every spirit that confesseth not that Jesus Christ is come in the flesh, is not from God. And this is that spirit of antichrist, of which ye have heard that it should come; and even now already it is in the world.

Little children, it is the last time: and as ye have heard that antichrist cometh, even now are there many antichrists; by which we know that it is the last time.

Ye are of your father the devil, and the lusts of your father ye will do: he was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it.

Ye know that ye were Gentiles, carried away to these dumb idols, even as ye were led.

If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth:

He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.

Whoever denieth the Son, the same hath not the Father: but he that acknowledgeth the Son hath the Father also.

If a man sayeth, I love God, and hateth his brother, he is a liar. For he that loveth not his brother, whom he hath seen, how can he love God, whom he hath not seen?

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.

Behold, I will make them of the synagogue of Satan, who say they are Jews, and are not, but do lie; behold, I will make them to come and worship before thy feet, and to know that I have loved thee.

Treasury of Scripture Knowledge

Summary

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

He is

Bible References

Who

He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.
If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth:
If a man sayeth, I love God, and hateth his brother, he is a liar. For he that loveth not his brother, whom he hath seen, how can he love God, whom he hath not seen?
Ye are of your father the devil, and the lusts of your father ye will do: he was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it.
Behold, I will make them of the synagogue of Satan, who say they are Jews, and are not, but do lie; behold, I will make them to come and worship before thy feet, and to know that I have loved thee.

He that

Whoever denieth the Son, the same hath not the Father: but he that acknowledgeth the Son hath the Father also.
And every spirit that confesseth not that Jesus Christ is come in the flesh, is not from God. And this is that spirit of antichrist, of which ye have heard that it should come; and even now already it is in the world.
Ye know that ye were Gentiles, carried away to these dumb idols, even as ye were led.
For many deceivers have entered into the world, who confess not that Jesus Christ is come in the flesh. This is a deceiver, and an antichrist.
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.

He is

Little children, it is the last time: and as ye have heard that antichrist cometh, even now are there many antichrists; by which we know that it is the last time.
All Translations
A Conservative Version
American Bible Union New Testament
American Standard Version
Amplified
An Understandable Version
Anderson New Testament
Bible in Basic English
Common New Testament
Daniel Mace New Testament
Darby Translation
Emphatic Diaglott Bible
Godbey New Testament
Goodspeed New Testament
Holman Bible
International Standard Version
John Wesley New Testament
Julia Smith Translation
King James 2000
King James Version
Lexham Expanded Bible
Living Oracles New Testament
Modern King James verseion
Modern Spelling Tyndale-Coverdale
Moffatt New Testament
Montgomery New Testament
NET Bible
New American Standard Bible
New Heart English Bible
Noyes New Testament
Sawyer New Testament
The Emphasized Bible
Thomas Haweis New Testament
Twentieth Century New Testament
Webster
Weymouth New Testament
Williams New Testament
World English Bible
Worldwide English (NT)
Worrell New Testament
Worsley New Testament
Youngs Literal Translation