Sayyiduna Ali (may Allah be pleased with him), in explaining the saying of Allah Almighty, "You are only a warner, and for every people there is a guide," relates that the Messenger of Allah (peace and blessings be upon him) said: "The Mundhir (warner) and the Hadi (guide): a man from Banu Hashim."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from al-Sari (may Allah have mercy on him) except al-Muttalib (may Allah have mercy on him), and Uthman (may Allah have mercy on him) is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الألف / 1361
Hadith Takhrij«أخرجه الضياء المقدسي فى «الأحاديث المختارة» برقم: 668، 669، والحاكم فى «المستدرك» برقم: 4671، وأحمد فى «مسنده» برقم: 1056، والطبراني فى «الصغير» برقم: 739، والطبراني فى «الأوسط» برقم: 4923، 7780»