Al-Kāfi - Volume 4 > One Becomes 111, in Ptikaf or Finds Hayd (menses)
Hadith #1

1ـ مُحَمَّدُ بْنُ إِسْمَاعِيلَ عَنِ الْفَضْلِ بْنِ شَاذَانَ عَنْ صَفْوَانَ بْنِ يَحْيَى عَنْ عَبْدِ الرَّحْمَنِ بْنِ الْحَجَّاجِ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَم) قَالَ إِذَا مَرِضَ الْمُعْتَكِفُ وَطَمِثَتِ الْمَرْأَةُ الْمُعْتَكِفَةُ فَإِنَّهُ يَأْتِي بَيْتَهُ ثُمَّ يُعِيدُ إِذَا بَرَأَ وَيَصُومُ. وَفِي رِوَايَةٍ أُخْرَى عَنْهُ لَيْسَ عَلَى الْمَرِيضِ ذَلِكَ.

1. Muhammad ibn ‘Isma‘il has narrated from al-Fadl ibn Shadhan from Safwan ibn Yahya from ‘Abd al-Rahman ibn al-Hajjaj who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, has said, ‘If one in the state of Ttikaf becomes ill or a female begins to experience Hayd (menses); they can go home then after getting well perform the ’ Ttikaf again and fast.’”