What did the Prophet Muhammad (saw) say to Mu'adh after hearing about him criticizing someone for leaving the prayer?
 Narrated `Amr:                     Jabir bin `Abdullah said, "Mu`adh bin Jabal used to pray with the Prophet and then go to lead his people in prayer Once he led the `Isha' prayer and recited Surat "Al-Baqara." Somebody left the prayer and Mu`adh criticized him. The news reached the Prophet and he said to Mu`adh, 'You are putting the people to trial,' and repeated it thrice (or said something similar) and ordered him to recite two medium Suras of Mufassal." (`Amr said that he had forgotten the names of those Suras).