But no man can tame the tongue. It is an unruly evil, full of deadly poison.
James 3:8
Surrounding context
3:7 For every kind of beast and bird, of reptile and creature of the sea, is tamed and has been tamed by mankind.
3:8 But no man can tame the tongue. It is an unruly evil, full of deadly poison.
3:9 With it we bless our God and Father, and with it we curse men, who have been made in the similitude of God.