Who.

1 John 2:4
If anyone says, "I know Him, " but does not keep His commandments, he is a liar, and the truth is not in him.

1 John 1:6
If we say we have fellowship with Him yet walk in the darkness, we lie and do not practice the truth.

1 John 4:20
If anyone says, "I love God, " but hates his brother, he is a liar. For anyone who does not love his brother, whom he has seen, cannot love God, whom he has not seen.

John 8:44
You belong to your father, the devil, and you want to carry out his desires. He was a murderer from the beginning, refusing to uphold the truth, because there is no truth in him. When he lies, he speaks his native language, because he is a liar and the father of lies.

Revelation 3:9
Look at those who belong to the synagogue of Satan, who claim to be Jews but are liars instead. I will make them come and bow down at your feet, and they will know that I love you.

he that.

1 John 2:23
Whoever denies the Son does not have the Father; whoever confesses the Son has the Father as well.

1 John 4:3
and every spirit that does not confess Jesus is not from God. This is the spirit of the antichrist, which you have heard is coming, and is already in the world at this time.

1 Corinthians 12:2, 3
You know that when you were pagans, you were influenced and led astray to mute idols. . . .

2 John 1:7
For many deceivers have gone out into the world, refusing to confess the coming of Jesus Christ in the flesh. Any such person is the deceiver and the antichrist.

Jude 1:4
For certain men have crept in among you unnoticed--ungodly ones who were designated long ago for condemnation. They turn the grace of our God into a license for immorality, and they 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 the antichrist is coming, so now many antichrists have appeared. This is how we know that it is the last hour.