Musannaf Ibn Abi Shaybah

Hazrat Ja'far bin Iyas narrates that I saw Hasan carrying a bier at a funeral. He placed the bier on his left shoulder, then turned and placed the front part of the bier on his right shoulder, then went to the back and placed the rear part of the bier on his right shoulder, then turned again and placed the rear part of the bier on his left shoulder, and then left it (for others).