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:15452Abū ʿAbdullāh al-Ḥāfiẓ > Abū Jaʿfar al-Baghdādī > Ismāʿīl b. Isḥāq > ʿAlī b. al-Madīnī Ḥaddathanīh Yaḥyá b. Saʿīd > Shuʿbah > Muḥammad b. ʿAbd al-Raḥman > Sulaymān b. Yasār > ʿAbdullāh b. ʿUtbah > ʿUmar b. al-Khaṭṭāb ؓ

[Machine] The waiting period of a woman if she does not menstruate for two months, and if she menstruates twice. We have narrated from Al-Hasan from Ali that he said: "The waiting period of a woman is two menstrual cycles. If she does not menstruate, then it is one month and a half."  

البيهقي:١٥٤٥٢أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ نا أَبُو جَعْفَرٍ الْبَغْدَادِيُّ نا إِسْمَاعِيلُ بْنُ إِسْحَاقَ نا عَلِيُّ بْنُ الْمَدِينِيِّ حَدَّثَنِيهِ يَحْيَى بْنُ سَعِيدٍ نا شُعْبَةُ حَدَّثَنِي مُحَمَّدُ بْنُ عَبْدِ الرَّحْمَنِ عَنْ سُلَيْمَانَ بْنِ يَسَارٍ عَنْ عَبْدِ اللهِ بْنِ عُتْبَةَ عَنْ عُمَرَ بْنِ الْخَطَّابِ ؓ قَالَ

عِدَّةُ الْأَمَةِ إِذَا لَمْ تَحِضْ شَهْرَيْنِ وَإِذَا حَاضَتْ حَيْضَتَيْنِ وَرُوِّينَا عَنِ الْحَسَنِ عَنْ عَلِيٍّ ؓ قَالَ عِدَّةُ الْأَمَةِ حَيْضَتَانِ فَإِنْ لَمْ تَكُنْ تَحِيضُ فَشَهْرٌ وَنِصْفٌ