Matthew 12:34
"Broods of vipers! how can ye speak good things, being yourselves evil? For, out of the abundance of the heart, the mouth speaks.
Acts 20:30
and from among yourselves will men arise, speaking perverse things, to draw away the disciples after them.
1 Timothy 5:13
And, at the same time, they learn to be idle, going around from house to house, and not only idle, but tattlers also and busy-bodies, speaking things which they ought not.
Titus 1:10-11
For there are many unruly men, vain-talkers and deceivers, especially those of the circumcision,
James 1:21
Wherefore, putting away all filthiness and overflowing of wickedness, receive in meekness the implanted word, which is able to save your souls.
James 3:6
And the tongue is a fire, the world of iniquity! the tongue is placed among our members, as that which defiles the whole body, and sets on fire the course of life, and is set on fire by Hell.