Sunan an-Nasa'i 1948
سنن النسائي#1948SahihIt was narrated from Al-Mughirah bin Shu'bah that:the Messenger of Allah said: "The rider should move behind the Janazah and the pedestrian may walk wherever he wishes, and the (funeral) prayer should be offered for a child
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiHasan
In-book reference: 21:131