James 3:8 in the King James Version
But the tongue can no man tame; it is an unruly evil, full of deadly poison.
Context
7 For every kind of animal, bird, creeping thing, and sea creature is tamed, and has been tamed by mankind;
8 but nobody can tame the tongue. It is a restless evil, full of deadly poison.
9 With it we bless our God and Father, and with it we curse men who are made in the image of God.