How a menstruating woman should assume Ihram for Hajj or for Umra

Narrated 'Urwa:

'Aisha said, "We set out with the Prophet in his last Hajj. Some of us intended to perform 'Umra while others Hajj. When we reached Mecca, Allah's Apostle ﷺ said, 'Those who had assumed the lhram for'Umra and had not brought the Hadi should finish his lhram and whoever had assumed the Ihram for 'Umra and brought the Hadi should not finish the Ihram till he has slaughtered his Hadi and whoever had assumed the lhram for Hajj should complete his Hajj." 'Aisha further said, "I got my periods (menses) and kept on menstruating till the day of 'Arafat, and I had assumed the Ihram for 'Umra only (Tamattu'). The Prophet ordered me to undo and comb my head hair and assume the lhram for Hajj only and leave the 'Umra. I did the same till I completed the Hajj. Then the Prophet sent 'Abdur Rahman bin Abi Bakr with me and ordered me to perform 'Umra from At-Tan'im in lieu of the missed 'Umra."

حَدَّثَنَا يَحْيَى بْنُ بُكَيْرٍ، قَالَ حَدَّثَنَا اللَّيْثُ، عَنْ عُقَيْلٍ، عَنِ ابْنِ شِهَابٍ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ، قَالَتْ خَرَجْنَا مَعَ النَّبِيِّ ﷺ فِي حَجَّةِ الْوَدَاعِ، فَمِنَّا مَنْ أَهَلَّ بِعُمْرَةٍ، وَمِنَّا مَنْ أَهَلَّ بِحَجٍّ، فَقَدِمْنَا مَكَّةَ فَقَالَ رَسُولُ اللَّهِ ﷺ " مَنْ أَحْرَمَ بِعُمْرَةٍ وَلَمْ يُهْدِ فَلْيُحْلِلْ، وَمَنْ أَحْرَمَ بِعُمْرَةٍ وَأَهْدَى فَلاَ يَحِلُّ حَتَّى يَحِلَّ بِنَحْرِ هَدْيِهِ، وَمَنْ أَهَلَّ بِحَجٍّ فَلْيُتِمَّ حَجَّهُ ". قَالَتْ فَحِضْتُ فَلَمْ أَزَلْ حَائِضًا حَتَّى كَانَ يَوْمُ عَرَفَةَ، وَلَمْ أُهْلِلْ إِلاَّ بِعُمْرَةٍ، فَأَمَرَنِي النَّبِيُّ ﷺ أَنْ أَنْقُضَ رَأْسِي وَأَمْتَشِطَ، وَأُهِلَّ بِحَجٍّ، وَأَتْرُكَ الْعُمْرَةَ، فَفَعَلْتُ ذَلِكَ حَتَّى قَضَيْتُ حَجِّي، فَبَعَثَ مَعِي عَبْدَ الرَّحْمَنِ بْنَ أَبِي بَكْرٍ، وَأَمَرَنِي أَنْ أَعْتَمِرَ مَكَانَ عُمْرَتِي مِنَ التَّنْعِيمِ.