Sayyiduna Ali (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said: "I am leaving you behind so that you may be my deputy." Sayyiduna Ali (may Allah be pleased with him) said: "O Messenger of Allah! Am I to stay behind from you?" The Prophet (peace and blessings be upon him) said: "Are you not pleased to be to me as Sayyiduna Harun (peace be upon him) was to Sayyiduna Musa (peace be upon him), except that there will be no prophet after me?"
Al-Tabarani recorded it in al-Mu'jam al-Awsat, and its narrators are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 14650