It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that when Sayyidah Fatimah bint Asad bin Hashim (may Allah be pleased with her), the mother of Sayyiduna Ali (may Allah be pleased with him), passed away, the Messenger of Allah (peace and blessings be upon him) came to her and sat by her head, then said: "O my mother! May Allah have mercy on you. You were my mother after my own mother; you would go hungry yourself and feed me to my fill, you would bear the want of clothing yourself and clothe me, you would hold yourself back from good food and feed me, and your aim in this was only the pleasure of Allah and the attainment of the abode of the Hereafter." Then he (peace and blessings be upon him) ordered that she be washed three times and three times. When it came to the water containing camphor, the Messenger of Allah (peace and blessings be upon him) poured it over her with his own blessed hand. Then the Messenger of Allah (peace and blessings be upon him) took off his blessed shirt and put it on her, and she was shrouded over it. Then the Messenger of Allah (peace and blessings be upon him) called Sayyiduna Usamah bin Zayd, Sayyiduna Abu Ayyub al-Ansari, Sayyiduna Umar bin al-Khattab (may Allah be pleased with them) and a black slave to dig the grave, so they dug her grave. When they reached the lahd (the side niche of the grave), the Messenger of Allah (peace and blessings be upon him) dug it with his own blessed hand and removed its earth with his own hands. When he (peace and blessings be upon him) had finished, the Messenger of Allah (peace and blessings be upon him) entered the grave and lay down in it, then supplicated: "Allah is the One who gives life and causes death, and He is Ever-Living and will never die. (O Allah!) Forgive my mother Fatimah bint Asad, prompt her with her argument (the answers to the questions of the grave), and make her place of entry spacious for her, by the means of the right of Your Prophet and of the Prophets who came before me, for indeed You are the Most Merciful of those who show mercy." Then he (peace and blessings be upon him) said four takbirs over her, then he (peace and blessings be upon him), Sayyiduna al-Abbas and Sayyiduna Abu Bakr al-Siddiq (may Allah be pleased with them) together lowered her into the grave.
Imam al-Tabarani (may Allah have mercy on him) said: "Only Sufyan al-Thawri narrated this hadith from Asim al-Ahwal, and Rawh bin Salah is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الألف / 189
Hadith Takhrij«أخرجه الطبراني فى «الكبير» برقم: 871»