2 John 1:7

because many leading astray did enter into the world, who are not confessing Jesus Christ coming in flesh; this one is he who is leading astray, and the antichrist.

1 John 4:1-3

Beloved, every spirit believe not, but prove the spirits, if of God they are, because many false prophets have gone forth to the world;

1 John 2:26

These things I did write to you concerning those leading you astray;

John 1:14

And the Word became flesh, and did tabernacle among us, and we beheld his glory, glory as of an only begotten of a father, full of grace and truth.

1 Timothy 3:16

and, confessedly, great is the secret of piety -- God was manifested in flesh, declared righteous in spirit, seen by messengers, preached among nations, believed on in the world, taken up in glory!

2 Peter 2:1-3

And there did come also false prophets among the people, as also among you there shall be false teachers, who shall bring in besides destructive sects, and the Master who bought them denying, bringing to themselves quick destruction,

1 John 2:18-22

Little youths, it is the last hour; and even as ye heard that the antichrist doth come, even now antichrists have become many -- whence we know that it is the last hour;

Revelation 12:9

and the great dragon was cast forth -- the old serpent, who is called 'Devil,' and 'the Adversary,' who is leading astray the whole world -- he was cast forth to the earth, and his messengers were cast forth with him.

Revelation 13:14

and it leadeth astray those dwelling on the land, because of the signs that were given it to do before the beast, saying to those dwelling upon the land to make an image to the beast that hath the stroke of the 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
And there did come also false prophets among the people, as also among you there shall be false teachers, who shall bring in besides destructive sects, and the Master who bought them denying, bringing to themselves quick destruction,
1 John 2:18
Little youths, it is the last hour; and even as ye heard that the antichrist doth come, even now antichrists have become many -- whence we know that it is the last hour;
1 John 4:1
Beloved, every spirit believe not, but prove the spirits, if of God they are, because many false prophets have gone forth to the world;

Who

John 1:14
And the Word became flesh, and did tabernacle among us, and we beheld his glory, glory as of an only begotten of a father, full of grace and truth.
1 Timothy 3:16
and, confessedly, great is the secret of piety -- God was manifested in flesh, declared righteous in spirit, seen by messengers, preached among nations, believed on in the world, taken up in glory!
1 John 4:2
in this know ye the Spirit of God; every spirit that doth confess Jesus Christ in the flesh having come, of God it is,
Revelation 12:9
and the great dragon was cast forth -- the old serpent, who is called 'Devil,' and 'the Adversary,' who is leading astray the whole world -- he was cast forth to the earth, and his messengers were cast forth with him.
Revelation 13:14
and it leadeth astray those dwelling on the land, because of the signs that were given it to do before the beast, saying to those dwelling upon the land to make an image to the beast that hath the stroke of the sword and did live,

This is

1 John 2:22
Who is the liar, except he who is denying that Jesus is the Christ? this one is the antichrist who is denying the Father and the Son;
1 John 4:3
and every spirit that doth not confess Jesus Christ in the flesh having come, of God it is not; and this is that of the antichrist, which ye heard that it doth come, and now in the world it is already.