Sahih Muslim
The Book of Pilgrimage (Kitab Al-Hajj)
Book Number: 007 / Hadith Number: 2876
Anas (Allah be pleased with him) reported: I heard Allah's Messenger (may peace be upon him) pronouncing Talbiya for both simultaneously, Talbiya for 'Umra and Hajj. Talbiya for Uwra and Hajj (he performed both Hajj and Umra as a Qarin). In another version words are: I heard Allah's Messenger (may peace be upon him) pronouncing Talbiya for Umra and Hajj (simultaneously)."