Musannaf Ibn Abi Shaybah 5538 — Those who considered it recommended

Umar bin Ata said: Nafi' bin Jubayr sent me to Sayyiduna al-Sa'ib, the son of Namir's sister (may Allah be pleased with him), to ask him about something that Sayyiduna Mu'awiyah (may Allah be pleased with him) had seen him do in the prayer. I asked him, and he said: "Yes. I prayed the Friday prayer with him in the maqsurah (the enclosed section of the mosque). When the imam gave the salam, I stood up in my place and prayed. When he went inside, he sent for me and said: 'Do not repeat what you did today. When you have prayed the Friday prayer, do not pray any prayer there until you have spoken or gone out, for the Prophet (peace and blessings be upon him) commanded us not to join one prayer to another without speaking or leaving the place.'"