It wasnarrated from Salim that his father said:
"I saw the Prophet(ﷺ),Abu Bakr and 'Umar walking ahead of the funeral (procession)." (RU)
English reference (RU): Vol. 1, Book 6, Hadith 1482 (RU)
Arabic reference (RU): Book 6, Hadith 1549 (RU)