I heard Allah's Messenger (ﷺ) 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 (ﷺ) pronouncing Talbiya for Umra and Hajj (simultaneously)."
Sahih Muslim Book 15, Hadith 236