James 3:7-10

For every kind of beasts and birds, of creeping things and things in the sea, is tamed, and hath been tamed by mankind: 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, who are made after the likeness of God: out of the same mouth cometh forth blessing and cursing. My brethren, these things ought not so to be.