James 3:5-6, 8-9

So the tongue also is a little member, and boasteth great things. Behold, how much wood is kindled by how small a fire! And the tongue is a fire: the world of iniquity among our members is the tongue, which defileth the whole body, and setteth on fire the wheel of nature, and is set on fire by hell.

but the tongue can no man tame; it is a restless evil, it is full of deadly poison. Therewith bless we the Lord and Father; and therewith curse we men, which are made after the likeness of God