question #1 Sahih al-Bukhari 1566, Book 25, Hadith 52 : What is the significance of maintaining Ihram until the sacrifice of Hadi is completed?

Hafsa the wife of the Prophet (ﷺ) said, “O Allah’s Messenger (ﷺ)! Why have the people finished their Ihram after
performing `Umra but you have not finished your Ihram after performing `Umra?” He replied, “I have
matted my hair and garlanded my Hadi. So I will not finish my Ihram till I have slaughtered (my
Hadi). ”