Muwatta Malik, Book 20, Hadith 888 (In-Book) ⓘ

Yahya related to me from Malik from Nafi from Abdullah ibn Umar that Hafsa, umm al-muminin, once said to the Messenger of Allah, may Allah bless him and grant him peace, "Why is it that everyone has left ihram and you still have not left ihram from your umra?" and he replied, "I have matted my hair and garlanded my sacrificial animal and will not leave ihram until I have sacrificed the animal."

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، عَنْ حَفْصَةَ أُمِّ الْمُؤْمِنِينَ، أَنَّهَا قَالَتْ لِرَسُولِ اللَّهِ صلى الله عليه وسلم مَا شَأْنُ النَّاسِ حَلُّوا وَلَمْ تَحْلِلْ أَنْتَ مِنْ عُمْرَتِكَ فَقَالَ ‏ "‏ إِنِّي لَبَّدْتُ رَأْسِي وَقَلَّدْتُ هَدْيِي فَلاَ أَحِلُّ حَتَّى أَنْحَرَ ‏" ‏ ‏.‏