Reference: Evil Speaking
Hastings
EVIL SPEAKING in the Bible covers sins of untruthfulness as well as of malice. It includes abuse, thoughtless talebearing, imputing of bad motives, slander, and deliberate false witness. Warnings against it are frequent; it is forbidden in the legislation of the OT (Ninth Commandment; De 19:16-19) and of the NT (Mt 5:22; 12:32; 15:19). Christians must expect this form of persecution (Mt 5:11), but must be careful to give no handle to it (Ro 14:16; Tit 2:8; 1Pe 2:12; 3:16).
C. W. Emmet.
See Verses Found in Dictionary
If an unrighteous witness rise up against any man to testify against him of wrongdoing, then both the men, between whom the controversy is, shall stand before Yahweh, before the priests and the judges who shall be in those days; read more. and the judges shall make diligent inquisition: and, behold, if the witness is a false witness, and has testified falsely against his brother; then you shall do to him as he had thought to do to his brother: so you shall put away the evil from the midst of you.
"Blessed are you when people reproach you, persecute you, and say all kinds of evil against you falsely, for my sake.
But I tell you, that everyone who is angry with his brother without a cause shall be in danger of the judgment; and whoever shall say to his brother, 'Raca!' shall be in danger of the council; and whoever shall say, 'You fool!' shall be in danger of the fire of Gehenna.
Whoever speaks a word against the Son of Man, it will be forgiven him; but whoever speaks against the Holy Spirit, it will not be forgiven him, neither in this age, nor in that which is to come.
For out of the heart come forth evil thoughts, murders, adulteries, sexual sins, thefts, false testimony, and blasphemies.
and soundness of speech that can't be condemned; that he who opposes you may be ashamed, having no evil thing to say about us.