It is narrated from Sayyiduna Ali (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said (when leaving him behind in Madinah on the occasion of the expedition of Tabuk): "I have left you behind so that you may be my deputy among my family." He said: "O Prophet of Allah, am I to stay behind after you?" He (peace and blessings be upon him) said: "Are you not pleased that you should be to me as Harun (peace be upon him) was to Musa (peace be upon him), except that there is no prophet after me?"
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated it from Sa'id bin Abi Arubah except Yazid bin Zuray', and no one narrated it from Yazid except Ibn Abi Ya'qub. Ma'mar narrated it from Qatadah, from Sa'id bin al-Musayyib, from Sayyiduna Sa'd (may Allah be pleased with him), and Ja'far bin Sulayman narrated it from Harb bin Shaddad, from Sa'id bin Abi Arubah, in the same way as Ma'mar narrated it."
Hadith Referenceالمعجم الأوسط / باب العين / 4248
Hadith Gradingمحدثین:رجاله رجال الصحيح
Hadith Takhrij«قال الهيثمي: رجاله رجال الصحيح «مجمع الزوائد ومنبع الفوائد، ج 9، ص 110»» «أخرجه الحاكم فى «المستدرك» برقم: 3313، والبزار فى «مسنده» برقم: 818»