Ephesians 4:25-31
For this reason, laying aside falsehood, every one of you should speak the truth to his fellow man; for we are, as it were, parts of one another.
Colossians 3:8
But now you must rid yourselves of every kind of sin--angry and passionate outbreaks, ill-will, evil speaking, foul-mouthed abuse--so that these may never soil your lips.
1 Timothy 6:5
and persistent wranglings on the part of people whose intellects are disordered and they themselves blinded to all knowledge of the truth; who imagine that godliness means gain.
James 1:21
Ridding yourselves, therefore, of all that is vile and of the evil influences which prevail around you, welcome in a humble spirit the Message implanted within you, which is able to save your souls.
James 1:26
If a man thinks that he is scrupulously religious, although he is not curbing his tongue but is deceiving himself, his religious service is worthless.
1 Peter 2:1
Rid yourselves therefore of all ill-will and all deceitfulness, of insincerity and envy, and of all evil speaking.