Proverbs 18:17-21 (NIV Bible)

17  In a the first to speak seems right, until someone comes forward and cross-examines

18  Casting the lot settles disputes and keeps strong opponents apart

19  A brother wronged is more unyielding than a fortified city; disputes are like the barred gates of a citadel

20  From the fruit of their mouth a person’s stomach is filled; with the harvest of  their lips they are satisfied

21  The tongue has the  power of life and death, and those who love it will eat its  fruit