Reference: Evil-speaking
Easton
is expressly forbidden (Tit 3:2; Jas 4:11), and severe punishments are denounced against it (1Co 5:11; 6:10). It is spoken of also with abhorrence (Ps 15:3; Pr 18:6-7), and is foreign to the whole Christian character and the example of Christ.
See Verses Found in Dictionary
The one who does not slander with his tongue, who does no evil to his neighbor, and who does not destroy his friend's reputation.
A fool's words bring strife, and his mouth invites fighting. A fool's mouth is his unraveling, and his lips entrap himself.
But now I am writing to you to stop associating with any so-called brother if he is sexually immoral, greedy, an idolater, a slanderer, a drunk, or a robber. You must even stop eating with someone like that.
thieves, greedy people, drunks, slanderers, and robbers will not inherit the kingdom of God.
They are not to insult anyone or be argumentative. Instead, they are to be gentle and perfectly courteous to everyone.
Do not criticize each other, brothers. Whoever makes it his habit to criticize his brother or to judge his brother is judging the Law and condemning the Law. But if you condemn the Law, you are not a practicer of the Law but its judge.