Sayyiduna Sahl bin Sa'd (may Allah be pleased with him) said: A man from the family of Marwan was appointed governor over Madinah. He summoned Sayyiduna Sahl bin Sa'd (may Allah be pleased with him) and ordered him to revile Sayyiduna Ali (may Allah be pleased with him). Sayyiduna Sahl bin Sa'd (may Allah be pleased with him) refused, so he said: If you will not revile him, then at least say: May Allah curse Abu Turab. Sayyiduna Sahl bin Sa'd (may Allah be pleased with him) said: The name "Abu Turab" was dearer to Sayyiduna Ali (may Allah be pleased with him) than all other names, and he would feel great joy when he was called by it. He was asked: Tell us why he was named "Abu Turab." He said: The Prophet (peace and blessings be upon him) came to the house of Sayyidah Fatimah (may Allah be pleased with her), and Sayyiduna Ali (may Allah be pleased with him) was not there. He (peace and blessings be upon him) said: "O Fatimah, where is your cousin (Sayyiduna Ali, may Allah be pleased with him)?" She said: Something happened between him and me, so he left angry and did not come back. He (peace and blessings be upon him) said to someone: "See where he is." The man came back and replied: O Messenger of Allah, he is sleeping in the mosque. The Prophet (peace and blessings be upon him) came to the mosque, and Sayyiduna Ali (may Allah be pleased with him) was lying down; his cloak had slipped off his side and dust had got on him. The Prophet (peace and blessings be upon him) was wiping the dust off him and saying: "Qum Aba Turab, qum Aba Turab" (Get up, O Abu Turab! Get up, O Abu Turab!).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4340