Sahih Bukhari | Volume 7 | Hadith Number 798

Narrated by Hafsa
(The wife of the Prophet) I said, "O Allah's Apostle! Why have the people finished their Ihram after performing the 'Umra while you have not finished your Ihram after your 'Umra?" He said, "I have done Talbid (of my hair) and have decorated my Hadis with garlands, so I shall not finish my Ihram till l have slaughtered my Hadi (animal for sacrifice)."