Sahih al-Bukhari, Hadith 1566 ⓘ
Narrated Ibn `Umar: Hafsa the wife of the Prophet said, "O Allah's Messenger! 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). "
حَدَّثَنَا إِسْمَاعِيلُ، قَالَ حَدَّثَنِي مَالِكٌ،. وَحَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، أَخْبَرَنَا مَالِكٌ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، عَنْ حَفْصَةَ ـ رضى الله عنهم ـ زَوْجِ النَّبِيِّ صلى الله عليه وسلم أَنَّهَا قَالَتْ يَا رَسُولَ اللَّهِ، مَا شَأْنُ النَّاسِ حَلُّوا بِعُمْرَةٍ وَلَمْ تَحْلِلْ أَنْتَ مِنْ عُمْرَتِكَ قَالَ " إِنِّي لَبَّدْتُ رَأْسِي، وَقَلَّدْتُ هَدْيِي فَلاَ أَحِلُّ حَتَّى أَنْحَرَ " .
also referenced under: Book 25, Hadith 52 (In-Book) & Volume 2, Book 26, Hadith 637 (USC-MSA)