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:15389Abū al-Ḥasan Muḥammad b. Abū al-Maʿrūf al-Isfirāyīnī Bihā > Bishr b. Aḥmad > Abū Jaʿfar Aḥmad b. Muḥammad al-Khayyāṭ > al-Ḥusayn b. al-Junayd al-Dāmighānī > Abū Usāmah > Hishām b. Ḥassān > Qays b. Saʿd > Bukayr b. ʿAbdullāh > Sulaymān b. Yasār

[Machine] Zaid bin Thabit said, "If a drop of blood drops in the third period, then her waiting period is over."  

البيهقي:١٥٣٨٩أَخْبَرَنَا أَبُو الْحَسَنِ مُحَمَّدُ بْنُ أَبِي الْمَعْرُوفِ الْإِسْفِرَايِينِيُّ بِهَا نا بِشْرُ بْنُ أَحْمَدَ نا أَبُو جَعْفَرٍ أَحْمَدُ بْنُ مُحَمَّدٍ الْخَيَّاطُ نا الْحُسَيْنُ بْنُ الْجُنَيْدِ الدَّامِغَانِيُّ نا أَبُو أُسَامَةَ عَنْ هِشَامِ بْنِ حَسَّانَ عَنْ قَيْسِ بْنِ سَعْدٍ عَنْ بُكَيْرِ بْنِ عَبْدِ اللهِ عَنْ سُلَيْمَانَ بْنِ يَسَارٍ قَالَ

قَالَ زَيْدُ بْنُ ثَابِتٍ إِذَا قُطِرَتْ مِنَ الْمُطَلَّقَةِ قَطْرَةٌ مِنَ الدَّمِ فِي الْحَيْضَةِ الثَّالِثَةِ فَقَدِ انْقَضَتْ عِدَّتُهَا