'Liar' in the Bible

Ye are of the devil, as your father, and ye desire to do the lusts of your father. He was a murderer from the beginning, and has not stood in the truth, because there is no truth in him. When he speaks falsehood, he speaks of what is his own; for he is a liar and its father:

And ye know him not; but I know him; and if I said, I know him not, I should be like you, a liar. But I know him, and I keep his word.

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

He that says, I know him, and does not keep his commandments, is a liar, and the truth is not in him;

Who is the liar but he who denies that Jesus is the Christ? He is the antichrist who denies the Father and the Son.

If any one say, I love God, and hate his brother, he is a liar: for he that loves not his brother whom he has seen, how can he love God whom he has not seen?

He that believes on the Son of God has the witness in himself; he that does not believe God has made him a liar, because he has not believed in the witness which God has witnessed concerning his Son.