Yusuf bin Mahak said: I attended the funeral of Rafi' bin Khadij (may Allah be pleased with him), and Ibn Umar and Ibn Abbas (may Allah be pleased with them both) were in it. Ibn Umar (may Allah be pleased with them both) went forward until he took hold of the front poles of the bier, placed it on his shoulder and walked on.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 6841