1 John 4:3
And every spirit that confesses not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, of which you have heard that it should come; and even now already is it in the world.
1 John 2:18
Little children, it is the last time: and as you have heard that antichrist shall come, even now are there many antichrists; by which 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? He is antichrist, that denies the Father and the Son.
2 John 1:7
For many deceivers are entered into the world, who confess not that Jesus Christ has come in the flesh. This is a deceiver and an antichrist.
2 Thessalonians 2:3-8
Let no man deceive you by any means: for that day shall not come, except there come the falling away first, and that man of sin be revealed, the son of perdition;