Proverbs 11:12

"It is foolish to belittle ones neighbor, a sensible person keeps quiet."

                                                                  - Proverbs 11:12 

Belittle:   To think of or speak about someone as being less than important or having little to no value; 

To damage the reputation of by speaking critical of another; 



Or ... to express negative opinions of another in an attempt to get others to think less of the person.