Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
bayhaqi:1542Abū Bakr b. al-Ḥārith al-Faqīh > ʿAlī b. ʿUmar al-Ḥāfiẓ > Abū ʿUthmān Saʿīd b. Muḥammad al-Ḥannāṭ > Abū Hishām al-Rifāʿī > Yaḥyá b. Ādam > ʿAlī > Ibrāhīm b. Ḥammād > Muḥammad b. ʿAbdullāh al-Mukharrimī > Yaḥyá b. Ādam > Sharīk

[Machine] "We have a woman who menstruates a straight and proper menstruation for fifteen days of the month." Ali said: and Sa'id ibn Muhammad al-Hannat narrated to us, from Abu Hisham, from Yahya ibn Adam, from Shurayk and Hasan ibn Salih who said: "The majority of menstruation is fifteen days."  

البيهقي:١٥٤٢أَخْبَرَنَا أَبُو بَكْرِ بْنُ الْحَارِثِ الْفَقِيهُ أَخْبَرَنَا عَلِيُّ بْنُ عُمَرَ الْحَافِظُ ثنا أَبُو عُثْمَانَ سَعِيدُ بْنُ مُحَمَّدٍ الْحَنَّاطُ ثنا أَبُو هِشَامٍ الرِّفَاعِيُّ ثنا يَحْيَى بْنُ آدَمَ قَالَ عَلِيٌّ وَحَدَّثَنَا إِبْرَاهِيمُ بْنُ حَمَّادٍ ثنا مُحَمَّدُ بْنُ عَبْدِ اللهِ الْمُخَرِّمِيُّ ثنا يَحْيَى بْنُ آدَمَ ثنا شَرِيكٌ قَالَ

عِنْدَنَا امْرَأَةٌ تَحِيضُ خَمْسَ عَشْرَةَ مِنَ الشَّهْرِ حَيْضًا مُسْتَقِيمًا صَحِيحًا قَالَ عَلِيٌّ وَحَدَّثَنَا سَعِيدُ بْنُ مُحَمَّدٍ الْحَنَّاطُ ثنا أَبُو هِشَامٍ ثنا يَحْيَى بْنُ آدَمَ عَنْ شَرِيكٍ وَحَسَنِ بْنِ صَالِحٍ قَالَا أَكْثَرُ الْحَيْضِ خَمْسَ عَشْرَةَ