الكافي 1/4/111/34

34. Muhammad ibn al-Husayn has narrated from Sahl ibn Ziyad from ibn al-Fadhal from Ali ibn al-Nu‘man from Abu Maryam al-Ansari who has said the following: “Once I asked Abu Ja‘far عليه السلام ,’How was the prayer for the dead body of the Holy Prophet صلى الله عليه وعلى آله وسلم ?’ The Imam عليه السلام said: ‘When Amir al-Mu’minin Ali عليه السلام washed his body and he placed him in the shroud and covered his body then ten persons came in and they walked around him. Amir al-Mu’minin Ali عليه السلام then stood in the middle of them and said, ‘God showers His blessings upon the Prophet and the angels seek forgiveness for him. Believers, pray for the Prophet and greet him with, ‘Peace be with you.’ The group also continued reciting what the Imam عليه السلام said until the people of Medina and people of ‘Awali also said the prayer (for burial in the same way)’”