Sunan an-Nasa'i 2722
سنن النسائي#2722SahihIt 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
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Bukhari
In-book reference: 24:104