It was narrated that Marwan bin al-Hakam said:
We were walking with ‘Uthman (رضي الله عنه) and saw a man entering ihram for both [‘umrah and Hajj].`Uthman (رضي الله عنه) said Who is this? They said: `Ali. He said: Do you not know that I have forbidden this? He said: Yes, but I will not give up the advice of the Messenger of Allah (ﷺ) for your opinion.