Ghusl for Menstruation and Postpartum
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 21
قَالَ: «وَ كُنَّ نِسَاءُ اَلنَّبِيِّ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ لاَ يَقْضِينَ اَلصَّلاَةَ إِذَا حِضْنَ وَ لَكِنْ يَتَحَشَّيْنَ حِينَ يَدْخُلُ وَقْتُ اَلصَّلاَةِ وَ يَتَوَضَّيْنَ ثُمَّ يَجْلِسْنَ قَرِيباً مِنَ اَلْمَسْجِدِ فَيَذْكُرْنَ اَللَّهَ عَزَّ وَ جَلَّ.
(From Imam Jafar ibn Muhammad Al-Sadiq عليه السلام), He said: 'The wives of the Prophet did not make up the prayers when they were menstruating. However, when the time for prayer entered, they would use cotton (for cleanliness), perform wudu (ablution), and then sit near the mosque to remember Allah سبحانه وتعالى, the Mighty and Majestic.'
- Ṣaḥīḥ al-Faqīh