Al-Mughirah bin Shu'bah said:
"I heard the Messenger of Allah(ﷺ)say: 'The rider should travel behind the funeral (procession)but theone who is walking may walk wherever he wants." (IT)
English reference (IT): Vol. 1, Book 6, Hadith 1481 (IT)
Arabic reference (IT): Book 6, Hadith 1548 (IT)