'Falsehood' in the Bible

Jesus saw Nathanael coming toward Him, and said of him, “Here is an Israelite indeed [a true descendant of Jacob], in whom there is no guile nor deceit nor duplicity!”

He who speaks on his own accord seeks glory and honor for himself. But He who seeks the glory and the honor of the One who sent Him, He is true, and there is no unrighteousness or deception in Him.

Ye are of a father -- the devil, and the desires of your father ye will to do; he was a man-slayer from the beginning, and in the truth he hath not stood, because there is no truth in him; when one may speak the falsehood, of his own he speaketh, because he is a liar -- also his father.