'Tongue' in the Bible

If anyone among you thinks himself to be religious while he doesn't bridle his tongue, but deceives his heart, this man's religion is worthless.

So the tongue is also a little member, and boasts great things. See how a small fire can spread to a large forest!

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.

But nobody can tame the tongue. It is a restless evil, full of deadly poison.