If anyone says, "I know Him," but does not keep His commandments, he is a liar, and the truth is not in him.

John 8:44
You belong to your father, the devil, and you want to carry out his desires. He was a murderer from the beginning, refusing to uphold the truth, because there is no truth in him. When he lies, he speaks his native language, because he is a liar and the father of lies.

Titus 1:10
For many are rebellious and full of empty talk and deception, especially those of the circumcision,

Titus 1:16
They profess to know God, but by their actions they deny Him. They are detestable, disobedient, and unfit for any good deed.

1 John 1:6
If we say we have fellowship with Him yet walk in the darkness, we lie and do not practice the truth.

1 John 1:8
If we say we have no sin, we deceive ourselves, and the truth is not in us.

1 John 2:3
By this we can be sure that we have come to know Him: if we keep His commandments.

1 John 3:6
No one who remains in Him keeps on sinning. No one who continues to sin has seen Him or known Him.

1 John 4:7
Beloved, let us love one another, because love comes from God. Everyone who loves has been born of God and knows God.

1 John 4:20
If anyone says, "I love God," but hates his brother, he is a liar. For anyone who does not love his brother, whom he has seen, cannot love God, whom he has not seen.

He that said, I know him, and keeps not his commandments, is a liar, and the truth is not in him.