1 John 2:4; 1 John 2:22

1 John 2:4

4 He who says "I know him" but disobeys his commandments is a liar, and the truth is not in him;

1 John 2:22

22 Who is the liar but he who denies that Jesus is the Christ? This is the antichrist, he who denies the Father and the Son.