Three people riding on one animal

Abdullah bin Ja'far said:
"Whenever the Messenger of Allahﷺ came back from a journey, he would be met by us(children). (One day) he was met by me and Hasan or Husain. He made one of us ride in front of him and the other behind him, until we came to Al-Madinah."

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَبْدُ الرَّحِيمِ بْنُ سُلَيْمَانَ، عَنْ عَاصِمٍ، حَدَّثَنَا مُوَرِّقٌ الْعِجْلِيُّ، حَدَّثَنِي عَبْدُ اللَّهِ بْنُ جَعْفَرٍ، قَالَ كَانَ رَسُولُ اللَّهِ ﷺ إِذَا قَدِمَ مِنْ سَفَرٍ تُلُقِّيَ بِنَا . قَالَ فَتُلُقِّيَ بِي وَبِالْحَسَنِ أَوْ بِالْحُسَيْنِ . قَالَ فَحَمَلَ أَحَدَنَا بَيْنَ يَدَيْهِ وَالآخَرَ خَلْفَهُ حَتَّى قَدِمْنَا الْمَدِينَةَ " .