Sunan an Nasai
2729
Sahih+2

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

SahihAbu Ghuddah
SahihAl-Albani