Ghusl for Menstruation and Postpartum
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 21
وَ سُئِلَ اَلصَّادِقُ عَلَيْهِ اَلسَّلاَمُ: عَنِ اَلْمُشَوَّهِينَ فِي خَلْقِهِمْ فَقَالَ «هُمُ اَلَّذِينَ يَأْتِي آبَاؤُهُمْ نِسَاءَهُمْ فِي اَلطَّمْثِ.
Imam Jafar ibn Muhammad Al-Sadiq عليه السلام was asked about those who are deformed in their creation. Imam عليه السلام said: 'They are those whose fathers engaged in intercourse with their wives during menstruation.'
- Ṣaḥīḥ al-Faqīh