Sahih Muslim , Book 15, Hadith 195 (In-Book) ⓘ
Hafsa (Allah be pleased with her) said: Messenger of Allah; the rest of the hadith is the same and (the concluding words of the Holy Prophet):" I won't put off Ihram until I have sacrificed the animal."
وَحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا أَبُو أُسَامَةَ، حَدَّثَنَا عُبَيْدُ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ حَفْصَةَ، - رضى الله عنها - قَالَتْ يَا رَسُولَ اللَّهِ . بِمِثْلِ حَدِيثِ مَالِكٍ " فَلاَ أَحِلُّ حَتَّى أَنْحَرَ " .
also referenced under: Hadith 1229 (Reference) & Book 7, Hadith 2836 (USC-MSA)