The Book of Hajj
24/40. Chapter:
At-Talbid (Having one's Hair Matted) for Ihram
Sunan an-Nasai
أَخْبَرَنَا عُبَيْدُ اللَّهِ بْنُ سَعِيدٍ، قَالَ حَدَّثَنَا يَحْيَى، عَنْ عُبَيْدِ اللَّهِ، قَالَ أَخْبَرَنِي نَافِعٌ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، عَنْ أُخْتِهِ، حَفْصَةَ قَالَتْ قُلْتُ لِلنَّبِيِّ صلى الله عليه وسلم يَا رَسُولَ اللَّهِ مَا شَأْنُ النَّاسِ حَلُّوا وَلَمْ تَحِلَّ مِنْ عُمْرَتِكَ قَالَ " إِنِّي لَبَّدْتُ رَأْسِي وَقَلَّدْتُ هَدْيِي فَلاَ أُحِلُّ حَتَّى أُحِلَّ مِنَ الْحَجِّ " .
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.'''
Reference : Sunan an-Nasa'i 2682In-book reference : Book 24, Hadith 64English translation : Vol. 3, Book 24, Hadith 2683