The Book of the Merits of the Companions
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَبْدُ الرَّحِيمِ بْنُ سُلَيْمَانَ، عَنْ عَاصِمٍ، حَدَّثَنِي مُوَرِّقٌ، حَدَّثَنِي عَبْدُ اللَّهِ بْنُ جَعْفَرٍ، قَالَ كَانَ النَّبِيُّ صلى الله عليه وسلم إِذَا قَدِمَ مِنْ سَفَرٍ تُلُقِّيَ بِنَا - قَالَ - فَتُلُقِّيَ بِي وَبِالْحَسَنِ أَوْ بِالْحُسَيْنِ - قَالَ - فَحَمَلَ أَحَدَنَا بَيْنَ يَدَيْهِ وَالآخَرَ خَلْفَهُ حَتَّى دَخَلْنَا الْمَدِينَةَ .Abdullah b. Ja'a'far reported that when Allah's Messenger (ﷺ) came back from a journey he met us. Once he met me, Hasan or Husain, and he mounted one of us before him and the other one behind him until we entered Medina
From Sahih Muslim, whose reports the scholars accept as authentic.