Matthew 12:34
O race of vipers, how can ye speak good things, who are yourselves so wicked? for out of the abundance of the heart the mouth speaketh.
Acts 20:30
And from among yourselves shall men arise, speaking perverse things to draw away disciples after them.
1 Timothy 5:13
And withal being idle they learn to go about from house to house: and are not only idle, but tatlers also and busy-bodies, talking of things unbecoming them.
Titus 1:10-11
For there are many disorderly persons, vain-talkers and deceivers, especially those of the circumcision; whose mouths must be stopped:
James 1:21
Laying aside therefore all filthiness, and excess of malice, receive with meekness the implanted word, which is able to save your souls.
James 3:6
And the tongue is a fire, a world of iniquity: so is the tongue among our several parts, defiling the whole body, inflaming the course of nature, and is set on fire by hell.