From Sahih Muslim (Hadith 3029):
Anas (Allah be pleased with him) reported: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)
Reference: Muslim 3029