James 3:5-6, 8-9

Even so, the tongue is a little part of the body and boasts great things. See how great a forest a little fire kindles. The tongue is a fire, a world of evil. The tongue is among the parts of the body, defiling the whole body, and setting the course of nature on fire, and it is set on fire by hell.

But no man can tame the tongue. It is an unruly evil, full of deadly poison. With it we bless the Lord and Father, and with it we curse men, who are made in the image of God.