‘Amr b. ‘Ata’ said that Nafi‘ b. Jubair sent him to as-Sa'ib to ask him about something Mu'awiya had seen him do in prayer. He said, “Yes, I prayed the Friday noon prayer along with him in the enclosure,* and when the imam uttered the salutation I stood up in my place and prayed. When he went in he sent me a message saying, ‘Never again do what you have done. When you pray the Friday noon prayer you must not join another prayer to it till you have engaged in conversation or gone out, for Allah's Messenger ﷺ gave us that precise command, not to join on a prayer till we had engaged in conversation or gone out’.” * The enclosure (maqsura) was a private part of the mosque reserved for the Caliph. Mu'awiya has been accused of being an innovator because he introduced this feature. Muslim transmitted it.