I do not recall anybody in the house as having the courage to gossip or backbite in the presence of the Imam even jokingly because His Eminence would be extremely upset.
Name of the narrator: Farideh Mostafawi, Etelaat daily dated March 02, 1982
Title of the Book: Impressions and Memoirs about Imam Khomeini's Practical Behaviour, vol. 1, chapter one, page 58