Narrated Sa`id bin Al-Musaiyab: `Ali and `Uthman differed regarding Hajj-at-Tamattu` while they were at 'Usfan (a familiar place near Mecca). `Ali said, I see you want to forbid people to do a thing that the Prophet did? When `Ali saw that, he assumed Ihram for both Hajj and `Umra.