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.
darimi:908Abū Muḥammad > Zayd b. Yaḥyá > Mālik > Ibn Anas > Saʾaltuh

[Machine] Concerning women, her menstruation used to last for seven days, but her menstruation increased. He said, "She will observe purification for three days."  

الدارمي:٩٠٨قَالَ أَبُو مُحَمَّدٍ قَرَأْتُ عَلَى زَيْدِ بْنِ يَحْيَى عَنْ مَالِكٍ هُوَ ابْنُ أَنَسٍ قَالَ سَأَلْتُهُ

عَنِ الْمَرْأَةِ كَانَ حَيْضُهَا سَبْعَةَ أَيَّامٍ فَزَادَتْ حَيْضَتُهَا قَالَ «تَسْتَظْهِرُ بِثَلَاثَةِ أَيَّامٍ»