What hinders you that you have not put off Ihram? Thereupon he said: I have stuck my hair and driven my sacrificial animal along with men and it is not permissible to put off Ihram (under this condition until I have sacrificed the animal. (Using translation from Muslim 1229e)
أَنَّ النَّبِيَّ ﷺ أَمَرَ أَزْوَاجَهُ أَنْ يُحْلِلْنَ عَامَ حَجَّةِ الْوَدَاعِ قَالَتْ حَفْصَةُ مَا يَمْنَعُكَ أَنْ تُحِلَّ؟ قَالَ «إِنِّي لَبَّدْتُ رَأْسِي وَقَلَّدْتُ هَدْيِي فَلَا أُحِلُّ حَتَّى أَنْحَرَ هَدْيِي»