Ibrahim bin Sa'd narrates from his father, and he from his grandfather: I saw Sa'd bin Abi Waqqas (may Allah be pleased with him) at the funeral of Abd al-Rahman bin Awf (may Allah be pleased with him) standing between the two front poles, with the bier resting on his shoulders.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 6835