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.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
nasai:3542 – al-ʿAbbās b. Muḥammad > al-Dūrī > al-Aswad b. ʿĀmir > Zāʾidah > Hishām > Ḥafṣah > Um ʿAṭiyyah

It was narrated from Hafsah, from Umm 'Atiyyah, from the Prophet, that he granted a concession to the woman whose husband has died, allowing her to use Qust and Azfar when purifying herself following her menses.  

النسائي:٣٥٤٢ – أَخْبَرَنَا الْعَبَّاسُ بْنُ مُحَمَّدٍ هُوَ الدُّورِيُّ قَالَ حَدَّثَنَا الأَسْوَدُ بْنُ عَامِرٍ عَنْ زَائِدَةَ عَنْ هِشَامٍ عَنْ حَفْصَةَ عَنْ أُمِّ عَطِيَّةَ

عَنِ النَّبِيِّ ﷺ أَنَّهُ رَخَّصَ لِلْمُتَوَفَّى عَنْهَا عِنْدَ طُهْرِهَا فِي الْقُسْطِ وَالأَظْفَارِ  

See similar narrations below:

Collected by Nasāʾī's Kubrá
nasai-kubra:5705 – al-ʿAbbās b. Muḥammad > al-Dūrī > al-Aswad b. ʿĀmir > Zāʾidah > Hishām > Ḥafṣah > Um ʿAṭiyyah

It was narrated from Hafsah, from Umm 'Atiyyah, from the Prophet, that he granted a concession to the woman whose husband has died, allowing her to use Qust and Azfar when purifying herself following her menses. (Using translation from Nasāʾī 3542)  

الكبرى للنسائي:٥٧٠٥ – أَخْبَرَنَا الْعَبَّاسُ بْنُ مُحَمَّدٍ هُوَ الدُّورِيُّ قَالَ حَدَّثَنَا الْأَسْوَدُ بْنُ عَامِرٍ قَالَ أَخْبَرَنَا زَائِدَةُ عَنْ هِشَامٍ عَنْ حَفْصَةَ عَنْ أُمِّ عَطِيَّةَ

عَنِ النَّبِيِّ ﷺ أَنَّهُ «رَخَّصَ لِلْمُتَوَفَّى عَنْهَا زَوْجُهَا عِنْدَ طُهْرِهَا فِي الْقُسْطِ وَالْأَظْفَارِ»