Hushaym narrated to us: Ḥumayd al-Ṭawīl informed us: Bakr ibn ʻAbdullāh al-Muzanī informed us, saying, “I heard Anas ibn Mālik relate, ‘I heard the Prophet (ﷺ) ﷺ pronounce the talbiyah for Ḥajj and ʻUmrah together.’ I mentioned that to Ibn ʻUmar, and he said, ‘He pronounced the talbiyah for Ḥajj alone.’ So I met Anas and told him what Ibn ʻUmar had said, and he replied, ‘Do you reckon us to be no more than children? I heard the Messenger of Allah (ﷺ) ﷺ say, “Labbayka ʻUmratan wa Ḥajjan.”’” Reference: Musnad Aḥmad 63