It was narrated from 'Abdullah bin 'Umar that his sister, Hafsah, said; "I said to the Prophet;'O Messenger of Allah! Why is it that the people have exited Ihram and you have not exited Ihram following your 'Umrah?'He said: “I have matted my hair and garlanded my Hadi (sacrificial animal), so I will not exit Ihram until I exit Ihram after Hajj”"
SahihSahihSahih - Agreed UponBook 24 · Hadith 64