Advice, Book of Proverbs

Whoever overlooks an offense fosters friendship, but whoever gossips about it separates friends.

+ Book of Proverbs 17, 9

[17:9] A paradox. One finds (love, friend) by concealing (an offense), one loses (a friend) by revealing (a secret). In 10:12 love also covers over a multitude of offenses.

http://www.usccb.org/bible/proverbs/17