Psalm 59:12
Proud people also possess an unruly tongue that curses, lies, and offends. This complements Psalm 10:2 in that a proud person may not have the opportunity to "run over" somebody in business, but every proud person can boldly or carelessly run over others with his tongue.
Some people are abrupt, abusive, harsh, and overbearing with their tongue. Even though they may not physically attack other people, they leave them emotionally abused. Some complain ceaselessly, spreading a pall of negativism that makes others want to avoid them. Neither harshness nor negativism promotes oneness. We need to study how God says to use the tongue, but the cause of offenses that separate us is almost invariably inconsiderate, self-centered pride producing its divisive fruit through the tongue.
John W. Ritenbaugh
Pride, Humility, and the Day of Atonement