Harb bin Surayj al-Bazzaz (may Allah have mercy on him) said: I said to Abu Ja'far Muhammad bin Ali bin al-Husayn (may Allah have mercy on him): "May I be ransomed for you! What do you say about this intercession that the people of Iraq talk about: is it true?" He asked: "Which intercession?" I said: "The intercession of Muhammad (peace and blessings be upon him)." He said: "By Allah, it is true! By Allah, my uncle Muhammad bin Ali Ibn al-Hanafiyyah (may Allah have mercy on him) informed me, through Sayyiduna Ali bin Abi Talib (may Allah be pleased with him), that the Messenger of Allah (peace and blessings be upon him) said: 'I will intercede for my Ummah (so much) that my Lord, the Mighty and Majestic, will call me and say: O Muhammad, are you pleased? And I will say: Yes, I am pleased.'"
Hadith Referenceالمعجم الأوسط / باب الألف / 2062
Hadith Gradingمحدثین:فيه محمد بن أحمد بن زيد المداري لم يُعرف، وبقية رجاله وثقوا على ضعف في بعضهم
Hadith Takhrij«قال الهيثمي: فيه محمد بن أحمد بن زيد المداري ولم أعرفه وبقية رجاله وثقوا على ضعف في بعضهم «مجمع الزوائد ومنبع الفوائد، ج 10، ص 377»» «أخرجه البزار فى «مسنده» برقم: 638»