1 John 4:3
Every spirit that does not confess Jesus is not from God. This is the spirit of the antichrist that you heard was coming and now it is already in the world.
1 John 2:18
Little children, it is the last hour! You heard that the antichrist is coming. Even now many antichrists have come. That is how we know that it is the last hour.
1 John 2:22
Who is the liar but he who denies that Jesus is the Christ? This is the antichrist, even he who denies the Father and the Son.
2 John 1:7
For many deceivers have gone into the world. They do not confess that Jesus Christ came in the flesh. This is the deceiver and the antichrist.
2 Thessalonians 2:3-8
Do not let anyone deceive you about this in any way. That day will not come unless apostasy (a falling away from truth) takes place first, and the man of lawlessness (sin), the man of destruction, is revealed. (2 Timothy 4:3)