Musannaf Ibn Abi Shaybah 11616 — Which side of the bier to begin

Ja'far bin Iyas said: I saw al-Hasan following a funeral, carrying it. He placed the bier on his left shoulder, then turned and placed the front of the bier on his right shoulder, then came back and placed the rear of the bier on his right shoulder, then turned again and placed the rear of the bier on his left shoulder, then left it (for others).