Sirach 28:11-15
{28:11} For an ill-tempered man enflames conflict, and a sinful man troubles his friends, and he casts hostility into the midst of those who have peace.
{28:12} For the fire burns according to the wood of the forest. And the anger of a man burns according to the strength of the man. And according to his resources, he will exalt his anger.
{28:13} A hasty contention kindles a fire. And a hasty quarrel sheds blood. And an accusatory tongue brings death.
{28:14} If you blow on a spark, it will increase to a fire. But if you spit on it, it will be extinguished. Both of these proceed from the mouth.
{28:15} The double-tongued whisperer is accursed. For he has disturbed many who had peace.
Sirach 28:6-10
{28:6} Remember your very end, and let animosities cease.
{28:7} For corruption and death are suspended over his commandments.
{28:8} Remember the fear of God, and do not be angry with your neighbor.
{28:9} Remember the covenant of the Most High, and overlook the ignorant offenses of your neighbor.
{28:10} Refrain from strife, and you will diminish your sins.