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 a false witness rises up against any man to testify a falling away against him, then both the men who are disagreeing shall stand before Jehovah, before the priests and the judges which shall be in those days. read more. And the judges shall make careful inquiry. 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 have done to his brother. So you shall put the evil away from among you.
Blessed are you when men shall revile you and persecute you, and shall say all kinds of evil against you falsely, for My sake.
But I say to you that whoever is angry with his brother without a cause shall be liable to the judgment. And whoever shall say to his brother, Raca, shall be liable to the sanhedrin; but whoever shall say, Fool! shall be liable to be thrown into the fire of hell.
And whoever speaks a word against the Son of Man, it shall be forgiven him. But whoever speaks against the Holy Spirit, it shall not be forgiven him, either in this world or in the world to come.
For out of the heart come evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies;
in sound speech that cannot be condemned, that he who is opposed may be ashamed, having no evil thing to say of you.