'Liar' in the Bible

You people are from your father the devil, and you want to do what your father desires. He was a murderer from the beginning, and does not uphold the truth, because there is no truth in him. Whenever he lies, he speaks according to his own nature, because he is a liar and the father of lies.

Yet you do not know him, but I know him. If I were to say that I do not know him, I would be a liar like you. But I do know him, and I obey his teaching.