(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.  

أَنَّهُ رَفَعَهُ إِلَى النَّبِيِّ ﷺ قَالَ الرَّاكِبُ يَسِيرُ خَلْفَ الْجَنَازَةِ وَالْمَاشِي يَمْشِي خَلْفَهَا وَأَمَامَهَا وَعَنْ يَمِينِهَا وَعَنْ يَسَارِهَا قَرِيبًا مِنْهَا وَالسِّقْطُ يُصَلَّى عَلَيْهِ وَيُدْعَى لِوَالِدَيْهِ بِالْمَغْفِرَةِ وَالرَّحْمَةِ  

(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. (Using translation from Abū Dāʾūd 3180)   

عَنِ النَّبِيِّ ﷺ قَالَ الرَّاكِبُ خَلْفَ الْجِنَازَةِ وَالْمَاشِي أَمَامَهَا قَرِيبًا عَنْ يَمِينِهَا أَوْ عَنْ يَسَارِهَا وَالسِّقْطُ يُصَلَّى عَلَيْهِ وَيُدْعَى لِوَالِدَيْهِ بِالْمَغْفِرَةِ وَالرَّحْمَةِ  

[Machine] The passenger walks behind the funeral procession, while the walker walks behind it and in front of it, to its right and left closely, and the deceased is prayed for him, and he is called upon for his parents with health and mercy. Yunus said: "The people of Ziyad mention the Prophet ﷺ, but as for me, I do not remember him."  

الرَّاكِبُ يَسِيرُ خَلْفَ الْجِنَازَةِ وَالْمَاشِي يَمْشِي خَلْفَهَا وَأَمَامَهَا وَيَمِينَهَا وَشِمَالَهَا قَرِيبًا وَالسِّقْطُ يُصَلَّى عَلَيْهِ يُدْعَى لِوَالِدَيْهِ بِالْعَافِيَةِ وَالرَّحْمَةِ قَالَ يُونُسُ وَأَهْلُ زِيَادٍ يَذْكُرُونَ النَّبِيَّ ﷺ وَأَمَّا أَنَا فَلَا أَحْفَظُهُ  

"الرّاكِبُ يَسِيرُ خَلفَ الجَنَازَةِ، والماشِى يَمْشِي خَلفَهَا وأَمَامَها وَعَنْ يَمِينهَا وَعَنْ يَسَارِهَا قَريبًا مِنْها، والسِّقْطُ يُصلى عَليهِ، وَيُدْعَى لوالدَيهِ - بالمغْفِرَةِ".