In general, don't take joy in disparaging others. In particular, when another person says something bad about you, don't respond by talking maliciously about him to others. In fact, even if some injury has resulted, strive always to praise the good qualities of others without blaming this or that person.

From THE GREAT PATH OF AWAKENING, by Jamgn Kongtrul, translated by Ken McLeod. 1993 by Ken McLeod.
Published by arrangement with Shambhala Publications, Inc., Boston.