Ghusl for Menstruation and Postpartum
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 21
وَ سَأَلَ عُبَيْدُ اَللَّهِ بْنُ عَلِيٍّ اَلْحَلَبِيُّ أَبَا عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ: عَنِ اَلْحَائِضِ مَا يَحِلُّ لِزَوْجِهَا مِنْهَا قَالَ «تَتَّزِرُ بِإِزَارٍ إِلَى اَلرُّكْبَتَيْنِ وَ تُخْرِجُ سُرَّتَهَا ثُمَّ لَهُ مَا فَوْقَ اَلْإِزَارِ.
Ubaidullah ibn Ali Al-Halabi asked Imam Jafar ibn Muhammad Al-Sadiq عليه السلام about what is permissible for a husband with regard to his menstruating wife. Imam عليه السلام said: 'She should cover herself with a cloth (izar) from her navel to her knees, and he may have what is above the izar.'.
- Ṣaḥīḥ al-Faqīh