Matthew 12:34
Ye broods of vipers, how can ye speak good things, yourselves being wicked? for out of the abundance of the heart the mouth speaketh.
Acts 20:30
Yea, from among yourselves shall men arise, speaking perverting doctrines, to draw away disciples after them.
1 Timothy 5:13
And at the same time also they learn to be idle, visiting about in the houses; and not merely idle, but talkative and inquisitive, speaking things they ought not.
Titus 1:10-11
For there are many disorderly persons vainly talkative, and under a spirit of delusion, especially some of the circumcised;
James 1:21
Wherefore laying aside all vicious pollution, and the abundance of iniquity, receive with meekness the ingrafted word, which hath power to save your souls.
James 3:6
And the tongue is a fire, a world of iniquity: in such manner is the tongue placed among our members, that it defileth all the body, and setteth on fire the circle of nature; and is set on fire of hell.