“I said: ‘O Messenger of Allah, what is the matter with
people who have exited Ihram when you have not exited your Ihram?’
He
said: ‘I have applied something to my head to keep my hair
together,
and I have garlanded my sacrificial animal, so I will not
exit Ihram
until I have offered my sacrifice.’”
Sunan Ibn Majah Book 25, Hadith 165