Musannaf Ibn Abi Shayba 17:1071

'Abd al-Rahim ibn Sulayman narrated to us, from 'Asim, who said: Muraq al-'Ijli narrated to us, who said: 'Abd Allah ibn Ja'far narrated to me, who said: When the Messenger of Allah (may Allah bless him and grant him peace) would arrive from a journey, he would be met by us. He said: So he met me and al-Hasan or al-Husayn. He said: Then he carried one of us in front of him and the other behind him, until we entered Medina.