Sahih Muslim Book 31, Hadith Number 5963.
Chapter : The merits of ‘Abdullah b. Ja’far (Allah be pleased with him).
Abdullah b. Ja’a’far reported that when Allah’s Messenger (may peace be upon him) 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.