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.
nasai-kubra:3320Muḥammad b. Yaḥyá b. Muḥammad > Muḥammad b. Mūsá from my father > Maʿmar > al-Zuhrī > ʿAlī b. Ḥusayn

[Machine] From Safiyyah, the wife of the Prophet ﷺ , that the Prophet ﷺ used to observe itikaf during the last ten days of Ramadan.  

الكبرى للنسائي:٣٣٢٠أَخْبَرَنَا مُحَمَّدُ بْنُ يَحْيَى بْنِ مُحَمَّدٍ قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ مُوسَى قَالَ قَرَأْتُ عَلَى أَبِي عَنْ مَعْمَرٍ عَنِ الزُّهْرِيِّ عَنْ عَلِيِّ بْنِ حُسَيْنٍ

عَنْ صَفِيَّةَ زَوْجِ النَّبِيِّ ﷺ أَنَّ النَّبِيَّ ﷺ «اعْتَكَفَ الْعَشْرَ الْغَوَابِرَ مِنْ شَهْرِ رَمَضَانَ»