Ephesians 6:16

16 above all, taking up the shield of faith, with which you will be able to quench all the fiery darts of the evil one. 

2 Corinthians 2:7

7 so that on the contrary you should rather forgive him and comfort him, lest by any means such a one should be swallowed up with his excessive sorrow. 

James 3:6

6 And the tongue is a fire. The world of iniquity among our members is the tongue, which defiles the whole body, and sets on fire the course of nature, and is set on fire by Gehenna.