2 John 1:7

For many deceivers are entered into the world, which confess not Jesus Christ as coming, or returning in the flesh. This is a deceiver and an antichrist.

1 John 4:1-3

Ye beloved, believe not every spirit: but prove the spirits whether they be of God, or not: for many false prophets are gone out in to the world.

1 John 2:26

These things have I written unto you, as concerning them that deceive you.

John 1:14

And the word was made flesh, and dwelt among us, and we saw the glory of it, as the glory of the only begotten son of the father, which word was full of grace, and verity.

1 Timothy 3:16

And without nay, great is that mystery of godliness. God was showed in the flesh, was justified in the spirit, was seen of angels, was preached unto the gentiles, was believed on in earth and received up in glory.

2 Peter 2:1-3

There were false prophets among the people, even as there shall be false teachers among you: which privily shall bring in damnable sects, even denying the Lord that hath bought them, and bring upon themselves swift damnation.

1 John 2:18-22

Little children it is now the last time, and as ye have heard how that antichrist shall come: even now are there many antichrists come already, whereby we know that it is the last time.

Revelation 12:9

And the great dragon, that old serpent called the devil and Satan; Was cast out. Which deceiveth all the world. And he was cast into the earth, and his angels were cast out also.

Revelation 13:14

And deceived them that dwelt on the earth, by the means of those signs which he had power to do in the sight of the beast, saying to them that dwelt on the earth: that they should make an image unto the beast, which had the wound of a sword, and did live.

Treasury of Scripture Knowledge

Summary

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

Bible References

Many

2 Peter 2:1
There were false prophets among the people, even as there shall be false teachers among you: which privily shall bring in damnable sects, even denying the Lord that hath bought them, and bring upon themselves swift damnation.
1 John 2:18
Little children it is now the last time, and as ye have heard how that antichrist shall come: even now are there many antichrists come already, whereby we know that it is the last time.
1 John 4:1
Ye beloved, believe not every spirit: but prove the spirits whether they be of God, or not: for many false prophets are gone out in to the world.

Who

John 1:14
And the word was made flesh, and dwelt among us, and we saw the glory of it, as the glory of the only begotten son of the father, which word was full of grace, and verity.
1 Timothy 3:16
And without nay, great is that mystery of godliness. God was showed in the flesh, was justified in the spirit, was seen of angels, was preached unto the gentiles, was believed on in earth and received up in glory.
1 John 4:2
Hereby shall ye know the spirit of God: Every spirit that confesseth that Jesus Christ is come in the flesh, is of God.
Revelation 12:9
And the great dragon, that old serpent called the devil and Satan; Was cast out. Which deceiveth all the world. And he was cast into the earth, and his angels were cast out also.
Revelation 13:14
And deceived them that dwelt on the earth, by the means of those signs which he had power to do in the sight of the beast, saying to them that dwelt on the earth: that they should make an image unto the beast, which had the wound of a sword, and did live.

This is

1 John 2:22
Who is a liar, but he that denieth that Jesus is Christ? The same is the antichrist that denieth the father and the son.
1 John 4:3
And every spirit that confesseth not that Jesus Christ is come in the flesh, is not of God. And the same is that spirit of antichrist, of whom ye have heard, how that he should come: and even now already is he in the world.