Sunan Abi Dawud 3180
سنن أبي داود#3180SahihNarrated Al-Mughirah ibn Shu'bah: (I think that the people of Ziyad informed me that he reported on the authority of the Prophet (ﷺ): A rider should go behind the bier, and those on foot should walk behind it, in front of it, on its right and on its left keeping near it. Prayer should be offered over an abortion and forgiveness and mercy supplicated for its parents
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 21:92