1 Peter 3:15
but sanctify Christ as Lord in your hearts; ready always for an answer to every one who asks of you an account concerning the hope that is in you, yet with meekness and fear;
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.
Titus 1:10-11
For there are many unruly men, vain-talkers and deceivers, especially those of the circumcision,
James 3:6-8
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.
2 Peter 2:18
For, uttering great swelling words of vanity, they entice, in desires of the flesh, by their lasciviousness, those just escaping from those who live in error;