'Liar' in the Bible

You are of your father the devil, and you want to do the desires of your father! That one was a murderer from the beginning, and does not stand firm in the truth, because truth is not in him. Whenever he speaks the lie, he speaks from his own [nature], because he is a liar and the father {of lies}.

And you have not known him, but I know him. And if I were to say that I do not know him, I would be a liar like you! But I know him and I keep his word.

May it never be! But let God be true but every human being a liar, just as it is written, "In order that you may be justified in your words, and may prevail when you are judged."

If we say that we have not sinned, we make him a liar, and his word is not in us.

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.

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.

If anyone says, "I love God," and hates his brother, he is a liar, for the one who does not love his brother whom he has seen is not able to love God whom he has not seen.

(The one who believes in the Son of God has the testimony in himself. The one who does not believe God has made him a liar, because he has not believed in the testimony that God has testified concerning his Son.)