1 John 2:4; 1 John 2:22

1 John 2:4

4 Whoever says, "I have come to know him," but does not obey his commandments, is a liar, and in such a person the truth does not exist;

1 John 2:22

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