Umar bin Ata bin Abu al-Khuwar said that Nafi bin Jubair sent him to al-Saib bin Yazid bin Ukht Namir to ask him about something Muawiyyah had seen him do in prayer. He said: I offered the Friday prayer along with him in enclosure. When I 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 prayer, you must not join another prayer to it till you have engaged in conversation or gone out, for the Prophet of Allah صلی اللہ علیہ وسلم gave the precise command not to join on prayer till you have engaged in conversation or gone out.