The donkey passed in front of the row and then he got down from it And joined the row along with the people.
أَخْبَرَهُ أَنَّهُ أَقْبَلَ يَسِيرُ عَلَى حِمَارٍ وَرَسُولُ اللَّهِ ﷺ قَائِمٌ يُصَلِّي بِمِنًى فِي حَجَّةِ الْوَدَاعِ يُصَلِّي بِالنَّاسِ قَالَ فَسَارَ الْحِمَارُ بَيْنَ يَدَىْ بَعْضِ الصَّفِّ ثُمَّ نَزَلَ عَنْهُ فَصَفَّ مَعَ النَّاسِ
That he came riding a donkey when Allah 's Apostle was standing at Mina during Hajjat-ul-Wadaʿ, leading the people in prayer. The donkey passed in front of a part of the row (of the people offering the prayer). Then he dismounted from it and took his position in the row with the people.
أَخْبَرَهُ أَنَّهُ أَقْبَلَ يَسِيرُ عَلَى حِمَارٍ وَرَسُولُ اللَّهِ ﷺ قَائِمٌ بِمِنًى فِي حَجَّةِ الْوَدَاعِ يُصَلِّي بِالنَّاسِ فَسَارَ الْحِمَارُ بَيْنَ يَدَىْ بَعْضِ الصَّفِّ ثُمَّ نَزَلَ عَنْهُ فَصَفَّ مَعَ النَّاسِ