Musannaf Ibn Abi Shaybah 11617 — Reports on what suffices in carrying

Ubayd bin Nistas said: We were with Abu Ubaydah bin Abdullah at a funeral, and he said: Sayyiduna Abdullah (may Allah be pleased with him) said: "When one of you is at a funeral, let him give his shoulder to all four sides of the bier, for this is part of the Sunnah. Then let him carry it (voluntarily) or leave it (for others)."