Sunan An-Nasa'i

It was narrated that Anas said:""I heard the Messenger of Allah 'Labbaika 'Umratan wa Hajjan ma'an, Iabbaika 'Umratan wa Hajjan ma'an (Here I am (O Allah) for ""Umrah and Hajj together, here I am (O Allah) for ""Umrah and Hajj together