(49) باب الْقِرَانِ .
It was narrated that Marwan bin Al-Hakam said:
"I was sitting with 'Uthan and he heard 'Ali reciting the Talbiyah for "Umrah and Hajj (together). He said 'Were you not forbidden to do this?' He said: 'Yes, but I heard the Messenger of "Allah reciting the Talbiyah for them together, and I will not igore what the Messenger of Allah said in favor of what you say.''
Reference: Sunan an-Nasa'i 2722
In-book reference: Book 24, Hadith 0
English translation: Vol. 3, Book 24, Hadith 2723