Mukhtasar Muslim (Abridged) 666 — Combining Hajj and Umrah (Qiran)

Narrated from Sayyiduna Bakr bin Abdullah that Sayyiduna Anas (may Allah be pleased with him) said: I heard the Messenger of Allah (peace and blessings be upon him) reciting the Talbiyah for both Hajj and Umrah. Bakr said: I narrated this same hadith to Sayyiduna Ibn Umar (may Allah be pleased with them both), and he said: The Prophet (peace and blessings be upon him) recited the Talbiyah only for Hajj. So I met Sayyiduna Anas (may Allah be pleased with him) and told him that Sayyiduna Ibn Umar (may Allah be pleased with them both) says so. Sayyiduna Anas (may Allah be pleased with him) said: You people consider us children; I have heard very well that the Messenger of Allah (peace and blessings be upon him) used to say: Labbaik for Umrah and Hajj.