'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.

You are of your father the devil, and it is your will to practice the desires [which are characteristic] of your father. He was a murderer from the beginning, and does not stand in the truth because there is no truth in him. When he lies, he speaks what is natural to him, for he is a liar and the father of lies and half-truths.