Al-Kāfi

Hadith 427
menstruation
1ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ مُحَمَّدِ بْنِ سَهْلِ بْنِ الْيَسَعِ عَنْ أَبِيهِ قَالَ سَأَلْتُ أَبَا الْحَسَنِ (عَلَيْهِ الْسَّلام) عَنِ الْمَرْأَةِ تَخْتَضِبُ وَهِيَ حَائِضٌ قَالَ لاَ بَأْسَ بِهِ.
1. A number of our people have narrated from Ahmad ibn Muhammad from Muhammad ibn Sahl ibn al-Yasa’ from his father who has said the following: “I once asked abu al-Hassan (a.s.), about the case of a woman who uses dye during her Hayd (menses). He (the Imam) said, ’It is not harmful.”’
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī