'Tongue' in the Bible

If anyone thinks he is religious without controlling his tongue, then his religion is useless and he deceives himself.

So too, though the tongue is a small part of the body, it boasts great things. Consider how large a forest a small fire ignites.

And the tongue is a fire. The tongue, a world of unrighteousness, is placed among the parts of our bodies. It pollutes the whole body, sets the course of life on fire, and is set on fire by hell.

but no man can tame the tongue. It is a restless evil, full of deadly poison.