1 John 2:4 in the King James Version
He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.
Context
3 This is how we know that we know him: if we keep his commandments.
4 One who says, “I know him,” and doesn’t keep his commandments, is a liar, and the truth isn’t in him.
5 But God’s love has most certainly been perfected in whoever keeps his word. This is how we know that we are in him: