Al-Kāfi

Hadith 696
itikaffastingmenstruation
2ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ وَسَهْلِ بْنِ زِيَادٍ جَمِيعاً عَنِ ابْنِ مَحْبُوبٍ عَنْ أَبِي أَيُّوبَ عَنْ أَبِي بَصِيرٍ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَم) فِي الْمُعْتَكِفَةِ إِذَا طَمِثَتْ قَالَ تَرْجِعُ إِلَى بَيْتِهَا وَإِذَا طَهُرَتْ رَجَعَتْ فَقَضَتْ مَا عَلَيْهَا.
2. A number of our people have narrated from Ahmad ibn Muhammad from and Sahl ibn Ziyad all from ibn Mahbub from abu Ayyub from abu Basir who has said the following: “Abu ‘Abd Allah (a.s.), has said, ‘If a female in Ttikaf begins to experience Hayd (menses) she must go home; and after becoming clean return to complete Qada’ (compensatory ’Ttikaf) of what she owes.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī