What did the people do after hearing about the practice of Dhikr (mentioning the name of Allah) in a loud voice after obligatory prayers during the lifetime of the Prophet Muhammad (saw)?
 Ibn 'Abbas reported:                      Dhikr (mentioning the name of Allah) in a loud voice after obligatory prayers was (a common practice) during the lifetime of the Apostle of Allah (may peace be upon him) ; and when I heard that I came to knew that they (the people) had finished the prayer.