It is narrated from Sayyiduna Gharafah bin al-Harith (may Allah be pleased with him) that he said: "I was present with the Messenger of Allah (peace and blessings be upon him) during the Farewell Pilgrimage, and the sacrificial camels were brought to him (peace and blessings be upon him). He (peace and blessings be upon him) said: 'Call Abu al-Hasan for me.' So Sayyiduna Ali (may Allah be pleased with him) was called, and he (peace and blessings be upon him) said: 'Take hold of the lower part of the spear.' And the Messenger of Allah (peace and blessings be upon him) himself took hold of its upper part. Then when he (peace and blessings be upon him) had finished (the sacrifice), he rode the mule and seated Sayyiduna Ali (may Allah be pleased with him) behind him."
Imam al-Tabarani (may Allah have mercy on him) said: "This hadith is not narrated from Sayyiduna Gharafah (may Allah be pleased with him) except with this chain, and Abd al-Rahman bin Mahdi (may Allah have mercy on him) is alone in narrating it."
It is like this in the Dar al-Haramayn printed edition, and its editor said: "The text is like this, and perhaps the correct reading is 'fa-da'a Aliyyan' (so he called Ali) or 'fa-du'iya Aliyyun' (so Ali was called)."
Hadith Referenceالمعجم الأوسط / باب الألف / 2837
Hadith Gradingمحدثین:إسناده ضعيف لجهالة عبد الله بن الحارث
Hadith Takhrij«قال ابن الملقن: هذا المعارض ضعيف فإن في إسناده عبد الله بن الحارث ولا يعرف له حال وإن ذكره ابن حبان في ثقاته ولا يعرف له راو غير حرملة بن عمران «البدر المنير في تخريج الأحاديث والآثار الواقعة في الشرح الكبير، ج 9، ص 311»» «أخرجه أبو داود فى «سننه» برقم: 1766، والبيهقي فى «السنن الكبرى» برقم: 10331، والطبراني فى «الكبير» برقم: 655»