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 an offence; then both the men between whom the controversy is shall stand before Jehovah, before the priests and the judges that shall be in those days; read more. and the judges shall make thorough inquiry; and if the witness be a false witness, and he have testified falsely against his brother, then shall ye do unto him as he had thought to have done unto his brother; and thou shalt put evil away from thy midst.
Blessed are ye when they may reproach and persecute you, and say every wicked thing against you, lying, for my sake.
But I say unto you, that every one that is lightly angry with his brother shall be subject to the judgment; but whosoever shall say to his brother, Raca, shall be subject to be called before the sanhedrim; but whosoever shall say, Fool, shall be subject to the penalty of the hell of fire.
And whosoever shall have spoken a word against the Son of man, it shall be forgiven him; but whosoever shall speak against the Holy Spirit, it shall not be forgiven him, neither in this age nor in the coming one.
For out of the heart come forth evil thoughts, murders, adulteries, fornications, thefts, false witnessings, blasphemies;
a sound word, not to be condemned; that he who is opposed may be ashamed, having no evil thing to say about us: