Ephesians 4:29
Let no unwholesome talk come out of your mouths, but only what is helpful for building up the one in need and bringing grace to those who listen.
Ephesians 4:31
Get rid of all bitterness, rage and anger, outcry and slander, along with every form of malice.
Matthew 12:34
You brood of vipers, how can you who are evil say anything good? For out of the overflow of the heart, the mouth speaks.
Ephesians 5:4
Nor should there be obscenity, foolish talk, or crude joking, which are out of character, but rather thanksgiving.
Colossians 3:8
But now you must put aside all such things as these: anger, rage, malice, slander, and filthy language from your mouth.
1 Thessalonians 5:11
Therefore encourage and build one another up, just as you are already doing.
Romans 3:14
their mouths are full of cursing and of bitterness;
1 Peter 2:1
Rid yourselves, therefore, of all malice, deceit, hypocrisy, envy, and slander.
Peace.