It wasnarrated that Anas bin Malik said:
"The Messenger of Allah(ﷺ),Abu Bakr, 'Umar and 'Uthman used to walk ahead of the funeral(procession)." (IT)
English reference (IT): Vol. 1, Book 6, Hadith 1483 (IT)
Arabic reference (IT): Book 6, Hadith 1550 (IT)