1 Peter 3:15
but in your hearts consecrate Christ as Lord, being always ready to make your defence to any one who asks from you a reason for the hope which you cherish.
Matthew 12:34
O vipers' brood, how can you speak what is good when you are evil? For it is from the overflow of the heart that the mouth speaks.
Titus 1:10-11
For there are many that spurn authority--idle, talkative and deceitful persons, who, for the most part, are adherents of the Circumcision.
James 3:6-8
And the tongue is a fire. That world of iniquity, the tongue, is placed within us spotting and soiling our whole nature, and setting the whole round of our lives on fire, being itself set on fire by Gehenna.
2 Peter 2:18
For, while they pour out their frivolous and arrogant talk, they use earthly cravings--every kind of immorality--as a bait to entrap men who are just escaping from the influence of those who live in error.