It was narrated from 'Imran:That the Messenger of Allah combined Hajj and "Umrah, then no Qur'an was revealed concerning that, and the Prophet did not forbid it, regardless of what one man may say
Hadith No. 2727
Sunan an Nasai
Gradings:
Abu Ghuddah:
Sahih
Al-Albani:
Sahih
Zubair Ali Zai:
Sahih - Agreed Upon