Sahih Muslim Book 7, Hadith Number 2830.

Chapter : Permissibility of the Tamattu’ (form of pilgrimage).

‘Imran b. Husain (Allah be pleased with him) reported: We performed Tamattu’ (Hajj and ‘Umra combining together) in the company of Allah’s Messenger (may peace be upon him), and nothing was revealed in the Qur’an (concerning the abrogation of this practice), and whatever a person (Hadhrat ‘Umar) said was his personal opinion. ‘Imran b. Husain narrated this Hadith (in these words also): “Allah’s Apostle (may peace be upon him) performed Hajj Tamattu’ and we also performed it along with him.”