Ghusl for Menstruation and Postpartum
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 21
وَ ذَكَرَ عَنْ أَبِيهِ عَلَيْهِ اَلسَّلاَمُ أَنَّ مَيْمُونَةَ كَانَتْ تَقُولُ: إِنَّ اَلنَّبِيَّ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ كَانَ يَأْمُرُنِي إِذَا كُنْتُ حَائِضاً أَنْ أَتَّزِرَ بِثَوْبٍ ثُمَّ أَضْطَجِعَ مَعَهُ فِي اَلْفِرَاشِ.
It was reported from Imam Jafar ibn Muhammad Al-Sadiq عليه السلام father, Imam Muhammad ibn Ali Al-Baqir عليه السلام, that Maymunah used to say: ‘The Prophet would instruct me, when I was menstruating, to wrap myself with a cloth (izar) and then lie down with him in bed.'
- Ṣaḥīḥ al-Faqīh