What did the Prophet Muhammad (saw) say when a person came into the Mosque while he was delivering the sermon on Friday (standing) on the pulpit without offering two rak'ahs?
 Jabir b. 'Abdullah reported that a person came (in the Mosque) while the Apostle of Allah (may peace be upon him) was delivering the sermon on Friday (standing) on the pulpit. He (the Holy Prophet) said to him:                      Have you offered two rak'ahs? He said: No. Upon this he said: Then observe (them).