775/1009- (Sahih Mawquf) From Mu'awiyah ibn Qurrah who said: My father said to me: "O my son! If you are in a gathering from which you hope for good, and a need hastens you away, then say: Peace be upon you; for you will share with them in what they attained in that gathering. And there are no people who sit in a gathering and then disperse from it without mentioning Allah, except that it is as if they dispersed from a donkey's carcass."