Sahih Muslim Book 7, Hadith Number 2860.

Chapter : Permissibility of Umra during the mouth of Hajj.

Rauh and Yahya b. Kathir narrated as Na5r reported that the Messenger of Allah (may peace be upon him) entered into the state of Ihram for Hajj. And in the narration of Abu Shihab (the words are): We went out with the Messenger of Allah (may peace be upon him) pronouncing Talbiya for Hajj, And in an the ahadith (narrated in this connection the words are): He led the morning prayer at al-Batha’, except al-jahdami who did not make mention of it.