The Book of Pilgrimage
15/16. Chapter:
The soundness of Ihram for the woman in Nifas; It is recommended for her to perform Ghusl before entering Ihram, and the same applies to one who is menstruating
Sahih Muslim
حَدَّثَنَا هَنَّادُ بْنُ السَّرِيِّ، وَزُهَيْرُ بْنُ حَرْبٍ، وَعُثْمَانُ بْنُ أَبِي شَيْبَةَ، كُلُّهُمْ عَنْ عَبْدَةَ، - قَالَ زُهَيْرٌ حَدَّثَنَا عَبْدَةُ بْنُ سُلَيْمَانَ، - عَنْ عُبَيْدِ اللَّهِ بْنِ عُمَرَ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ الْقَاسِمِ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، - رضى الله عنها - قَالَتْ نُفِسَتْ أَسْمَاءُ بِنْتُ عُمَيْسٍ بِمُحَمَّدِ بْنِ أَبِي بَكْرٍ بِالشَّجَرَةِ فَأَمَرَ رَسُولُ اللَّهِ صلى الله عليه وسلم أَبَا بَكْرٍ يَأْمُرُهَا أَنْ تَغْتَسِلَ وَتُهِلَّ .
`A'isha (Allah be pleased with her) reported that Asma' bint `Umais gave birth to Muhammad b Abu Bakr near Dhu'l-Hulaifa. The Messenger of Allah (ﷺ) commanded Abu Bakr to convey to her that she should take a bath and then enter into the state of Ihram.
Reference : Sahih Muslim 1209In-book reference : Book 15, Hadith 117USC-MSA web (English) reference : Book 7, Hadith 2762