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-kubra:2073 – Ibrāhīm b. Yaʿqūb > Aḥmad b. Isḥāq > Whayb > Manṣūr b. ʿAbd al-Raḥman from his mother > ʿĀʾishah

"Something bad was said in the presence of the Prophet about a person who had died. He said: 'Do not say anything but good about your dead."' (Using translation from Nasāʾī 1935)  

الكبرى للنسائي:٢٠٧٣ – أَخْبَرَنِي إِبْرَاهِيمُ بْنُ يَعْقُوبَ قَالَ حَدَّثَنِي أَحْمَدُ بْنُ إِسْحَاقَ قَالَ حَدَّثَنِي وهَيْبٌ قَالَ حَدَّثَنَا مَنْصُورُ بْنُ عَبْدِ الرَّحْمَنِ عَنْ أُمِّهِ عَنْ عَائِشَةَ قَالَتْ

ذُكِرَ عِنْدَ النَّبِيِّ ﷺ هَالِكٌ بِسُوءٍ فَقَالَ «لَا تَذْكُرُوا هَلْكَاكُمْ إِلَّا بِخَيْرٍ»  

See similar narrations below:

Collected by Nasāʾī, Suyūṭī
nasai:1935 – Ibrāhīm b. Yaʿqūb > Aḥmad b. Isḥāq > Wuhayb > Manṣūr b. ʿAbd al-Raḥman from his mother > ʿĀʾishah

"Something bad was said in the presence of the Prophet about a person who had died. He said: 'Do not say anything but good about your dead."'  

النسائي:١٩٣٥ – أَخْبَرَنَا إِبْرَاهِيمُ بْنُ يَعْقُوبَ قَالَ حَدَّثَنِي أَحْمَدُ بْنُ إِسْحَاقَ قَالَ حَدَّثَنَا وُهَيْبٌ قَالَ حَدَّثَنَا مَنْصُورُ بْنُ عَبْدِ الرَّحْمَنِ عَنْ أُمِّهِ عَنْ عَائِشَةَ قَالَتْ

ذُكِرَ عِنْدَ النَّبِيِّ ﷺ هَالِكٌ بِسُوءٍ فَقَالَ لاَ تَذْكُرُوا هَلْكَاكُمْ إِلاَّ بِخَيْرٍ