Who is the fifth mother of the Prophet, may Allah bless him and grant him peace, who migrated with him and died, whereupon he wept over her, prayed over her, buried her, and supplicated for her that Allah protect her from the compression of the grave?

The mother of the Prophet, upon whom be peace, about whom he said, "May Allah have mercy on you, O my mother," is Fatima bint Asad ibn Hashim, the wife of Abu Talib and mother of Ali, may Allah be pleased with him. The Prophet, upon whom be peace, lived in her home after the death of his grandfather. She embraced Islam, migrated, and died in Medina. She was buried by the Prophet, upon whom be peace, who washed her, shrouded her with his shirt, descended into her grave, and supplicated for her.