11 Bible Verses about Evil Speaking

Therefore, put away all malice and all deceit and hypocrisy and envy and all slander.

For there are many rebellious men, empty talkers and deceivers, especially those of the circumcision. They must be silenced, because they are upsetting whole families by teaching things they ought not to teach for the sake of sordid gain.

to speak evil of no one, to be peaceable and gentle, and to show true humility toward all men.

If anyone thinks himself to be religious, and yet does not bridle his tongue but deceives his own heart, this man's religion is worthless.

So also the tongue is a small part of the body, and yet it boasts of great things. See how great a forest is set aflame by such a small fire! And the tongue is a fire, a world of evil among the members of the body. The tongue corrupts our whole person, sets the whole course of our life on fire, and is itself set on fire by hell. For every species of beasts and birds, of reptiles and creatures of the sea, is tamed and has been tamed by the human race.read more.
But no man can tame the tongue. It is a restless evil, full of deadly poison. With it we bless our Lord and Father, and with it we curse men, who have been made in the likeness of God. From the same mouth come blessing and cursing. My brethren, this ought not to be so.

Do not speak against one another, brethren. He who speaks against a brother or judges his brother, speaks against the law and judges the law. But if you judge the law, you are not a doer of the law but a judge of it.

Or do you not know that the unrighteous will not inherit the kingdom of God? Do not be deceived; neither the immoral, nor idolaters, nor adulterers, nor sexual perverts, nor thieves, nor the greedy, nor drunkards, nor revilers, nor swindlers will inherit the kingdom of God.

"Their throat is an open grave; they use their tongues to practice deceit." "The poison of asps is under their lips."

Therefore, laying aside falsehood, each one of you must speak truth with his neighbor, for we are members of one another.

Let no unwholesome talk come out of your mouths, but only such as is good for building others up according to the need of the moment, that it may impart grace to those who hear. And do not grieve the Holy Spirit of God, in whom you were sealed for the day of redemption. Let all bitterness and wrath and anger and clamor and slander be put away from you, along with all malice.

And there must be no filthiness and silly talk, or coarse jesting, which are not fitting, but rather let there be thanksgiving.