3-265 Muhammad ibn Ahmad al-Senani al-Mokattib - may God be pleased with him - narrated that Ahmad ibn Yahya ibn Zakariya al-Qat’tan quoted Bakr ibn Abdullah ibn Habib, on the authority of Tamim ibn Buhlool, onthe authority of his father, on the authority of Abdullah ibn al-Fazl al-Hashemi that Aba Abdullah as-Sadiq (MGB) said,

“Of the following three I do not really know which one is a greater offense than the others. The first is following a funeral procession without having on one’s robe. The second is striking one’s buttocks with the hand at times of calamities. The third one is saying ‘Be benign to him. Have mercy upon him. May God have mercy upon you’ when attending a funeral procession.”