Sahih Muslim Book 007, Hadith Number 2826.
Chapter : Permissibility of the Tamattu' (form of pilgrimage).
Imran b. Husain reported: I am narrating to you a Hadith by which Allah will benefit you (and the Hadith is) that Allah's Messenger (may peace be upon him) combined Hajj and 'Umra, and he did not forbid (this combination) till he died, (Moreover) nothing was revealed in the Holy Qur'an which forbade it. And I was always blessed till I was branded and then it (blessing) was abandoned. I then abandoned branding and it (the blessing was restored).