1 John 2:4; 1 John 2:22

1 John 2:4

4 The one who says "I have come to know him," and does not keep his commandments is a liar, and the truth is not in this person.

1 John 2:22

22 Who is the liar except the one who denies that Jesus is the Christ? This person is the antichrist, the one who denies the Father and the Son.