1 John 2:22

Who is the liar except the one who denies that Jesus is the Christ? This person is the antichrist, the one who denies the Father and the Son.

2 John 1:7

For many deceivers have gone out into the world, those who do not confess Jesus Christ coming in [the] flesh. This person is the deceiver and the antichrist!

1 John 4:3

and every spirit that does not confess Jesus is not from God, and this is the [spirit] of the antichrist, [of] which you have heard that it is coming, and now it is already in the world.

1 John 2:18

Children, it is the last hour, and just as you have heard that antichrist is coming, even now many antichrists have arisen, by which we know that it is the last hour.

John 8:44

You are of your father the devil, and you want to do the desires of your father! That one was a murderer from the beginning, and does not stand firm in the truth, because truth is not in him. Whenever he speaks the lie, he speaks from his own [nature], because he is a liar and the father {of lies}.

1 Corinthians 12:2-3

You know that when you were pagans, you were led astray to the speechless idols, however you were led.

1 John 1:6

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

1 John 2:4

The one who says "I have come to know him," and does not keep his commandments is a liar, and the truth is not in this person.

1 John 2:23

Everyone who denies the Son does not have the Father [either]; the one who confesses the Son has the Father also.

1 John 4:20

If anyone says, "I love God," and hates his brother, he is a liar, for the one who does not love his brother whom he has seen is not able to love God whom he has not seen.

Jude 1:4

For certain men have slipped in stealthily, who were designated long ago for this condemnation, ungodly ones, who change the grace of our God into licentiousness and who deny our only Master and Lord Jesus Christ.

Revelation 3:9

Behold, I am causing [those] of the synagogue of Satan, the ones who call themselves Jews and are not, but are lying--behold, I will make them {come} and kneel down before your feet and acknowledge that I have loved you.

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

1 John 2:4
The one who says "I have come to know him," and does not keep his commandments is a liar, and the truth is not in this person.
1 John 1:6
If we say that we have fellowship with him and walk in the darkness, we lie and do not practice the truth.
1 John 4:20
If anyone says, "I love God," and hates his brother, he is a liar, for the one who does not love his brother whom he has seen is not able to love God whom he has not seen.
John 8:44
You are of your father the devil, and you want to do the desires of your father! That one was a murderer from the beginning, and does not stand firm in the truth, because truth is not in him. Whenever he speaks the lie, he speaks from his own [nature], because he is a liar and the father {of lies}.
Revelation 3:9
Behold, I am causing [those] of the synagogue of Satan, the ones who call themselves Jews and are not, but are lying--behold, I will make them {come} and kneel down before your feet and acknowledge that I have loved you.

He that

1 John 2:23
Everyone who denies the Son does not have the Father [either]; the one who confesses the Son has the Father also.
1 John 4:3
and every spirit that does not confess Jesus is not from God, and this is the [spirit] of the antichrist, [of] which you have heard that it is coming, and now it is already in the world.
1 Corinthians 12:2
You know that when you were pagans, you were led astray to the speechless idols, however you were led.
2 John 1:7
For many deceivers have gone out into the world, those who do not confess Jesus Christ coming in [the] flesh. This person is the deceiver and the antichrist!
Jude 1:4
For certain men have slipped in stealthily, who were designated long ago for this condemnation, ungodly ones, who change the grace of our God into licentiousness and who deny our only Master and Lord Jesus Christ.

He is

1 John 2:18
Children, it is the last hour, and just as you have heard that antichrist is coming, even now many antichrists have arisen, by which we know that it is the last hour.