'Tongue' in the Bible

If any man thinketh himself to be religious, while he bridleth not his tongue but deceiveth his heart, this man's religion is vain.

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.