Al-Kāfi - Volume 5 > Conjugal Relations During Her Menses Before Ghusl
Hadith #2

2- مُحَمَّدُ بْنُ يَحْيَى عَنْ سَلَمَةَ بْنِ الْخَطَّابِ عَنْ عَلِيِّ بْنِ الْحَسَنِ الطَّاطَرِيِّ عَنْ مُحَمَّدِ بْنِ أَبِي حَمْزَةَ عَنْ عَلِيِّ بْنِ يَقْطِينٍ عَنْ أَبِي الْحَسَنِ مُوسَى (عَلَيْهِ السَّلام) قَالَ سَأَلْتُهُ عَنِ الْحَائِضِ تَرَى الطُّهْرَ وَيَقَعُ بِهَا زَوْجُهَا قَالَ لا بَأْسَ وَالْغُسْلُ أَحَبُّ إِلَيَّ.

2. Muhammad ibn Yahya has narrated from Salmah ibn al-Khattab from Ali ibn al-Hassan al-Tatariy from Muhammad ibn abu Hamzah from Ali ibn Yaqtin who has said the following: “I once asked abu ‘Abd Allah, ‘Alayhi al-Salam, about the case of a woman experiencing Hayd (menses) who finds herself clean and her husband goes to bed with her. He (the Imam) said, ‘It is not unlawful but taking Ghusl (bath) is more likeable to me.’”