Where might I find bible verses or pages about?

well my ex husbands brother sent a kinda not so nice message to me and Im looking for bible verses or pages about when one can be mean or cruel to the other person and hurting their feelings, we are or course no longer in laws but I would at least hope we were still friends, I am NOT perfect in any way shape or form but still want to send him a page or verse kinda to say hey get the hint we are all human beings with feelings not only do we bleed the same but we feel the same too.... I spent thanksgiving alone because my whole family is dead and it was a sad day for me already and now this from my ex husbands brother replies to me in a sarcastic/snobbish way as to why he would not accept my friends request on facebook.... please can anyone help me find some good pages or verses about this that may tell him hey be nice, treat all humans equally and that no one is perfect