Ubayd, the freed slave of al-Sa'ib (may Allah be pleased with him), said: I saw Ibn Umar (may Allah be pleased with them both) and Ubayd bin Umayr both walking in front of the funeral. Then they went ahead, sat down and began talking, and when it drew near them, they stood up.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 6863