Sirach 28:5-15

5 If he that is but flesh nourish hatred, who will intreat for pardon of his sins?
6 Remember thy end, and let enmity cease; corruption and death, and abide in the commandments.
7 Remember the commandments, and bear no malice to thy neighbour: the covenant of the Highest, and wink at ignorance.
8 Abstain from strife, and thou shalt diminish thy sins: for a furious man will kindle strife,
9 A sinful man disquieteth friends, and maketh debate among them that be at peace.
10 As the matter of the fire is, so it burneth: and as a man's strength is, so is his wrath; and according to his riches his anger riseth; and the stronger they are which contend, the more they will be inflamed.
11 An hasty contention kindleth a fire: and an hasty fighting sheddeth blood.
12 If thou blow the spark, it shall burn: if thou spit upon it, it shall be quenched: and both these come out of thy mouth.
13 Curse the whisperer and doubletongued: for such have destroyed many that were at peace.
14 A backbiting tongue hath disquieted many, and driven them from nation to nation: strong cities hath it pulled down, and overthrown the houses of great men.
15 A backbiting tongue hath cast out virtuous women, and deprived them of their labours.

The Brenton translation of the Septuagint is in the public domain.