Marwan reported,

Uthman forbade combining Umrah with Hajj, and that a man should join Hajj and Umrah together.So Ali declared, "Here I am, with a Hajj and an Umrah together."Uthman said, "Are you doing this when I am forbidding it?"Ali replied, "I would never abandon the sunnah of the Messenger of Allah ﷺ for any person."

Nasai 2725

Sahih

أخبرنا إسحق بن إبراهيم قال أنبأنا النضر عن شعبة بهذا الإسناد مثله

النسائي 2725صحيح
Contents
Reference
Commentary
Ayat
Collection
Sunan Nasai Sughra
Book
Rituals of Hajj
Chapter
Quran
Numbering
Darussalam 2725
Nasai 2725