1 John 4:3

and every spirit which does not confess Jesus is not of God. And this is the [spirit] of anti-christ, of which you have heard that he is coming, and he is now in the world already.

1 John 2:18

Little children, it is the last time; and as you heard that antichrist is coming, even now many have become anti-christs; whence we know that it is the last time.

1 John 2:22

Who is a liar but he that denies that Jesus is the Christ? This is the anti-christ, [the man that] denies the Father and the Son.

2 John 1:7

For many deceivers have gone out into the world, who do not confess Jesus Christ coming in the flesh; this is the deceiver, and the antichrist.

2 Thessalonians 2:3-8

Let no one deceive you in any way, for [he shall not come] unless the apostacy comes first, and the man of sin is revealed, the son of destruction,

Treasury of Scripture Knowledge

Summary

1 John 4:3

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

And this

1 John 2:18

2 Thessalonians 2:7

2 John 1:7

General references

John 8:47

Bible References

And this

Little children, it is the last time; and as you heard that antichrist is coming, even now many have become anti-christs; whence we know that it is the last time.

For the mystery of wickedness already works, [God] only restrains it just now, till it shall be out of the way;

For many deceivers have gone out into the world, who do not confess Jesus Christ coming in the flesh; this is the deceiver, and the antichrist.

General references

He that is of God hears the words of God; you, therefore, hear not, because you are not of God.