بُلُوغُ الْمَرَامِ
Bulugh al-Maram 960
Business Transactions
وَعَنْ عَائِشَةَ -رَضِيَ اَللَّهُ عَنْهَا- { أَنَّ رَجُلاً أَتَى اَلنَّبِيَّ - صلى الله عليه وسلم -قَالَ: يَا رَسُولَ اَللَّهِ ! إِنَّ أُمِّي اُفْتُلِتَتْ نَفْسُهَا وَلَمْ تُوصِ , وَأَظُنُّهَا لَوْ تَكَلَّمَتْ تَصَدَّقَتْ , أَفَلَهَا أَجْرٌ إِنْ تَصَدَّقْتُ عَنْهَا ? قَالَ : " نَعَمْ } مُتَّفَقٌ عَلَيْهِ , وَاللَّفْظُ لِمُسْلِمٍ [1] .
Narrated 'Aishah (RA): A man came to the Prophet (ﷺ) and said, "O Allah's Messenger (ﷺ) , my mother had died suddenly, and did not make a will. And I think she would have given out Sadaqah if she had been able to speak, so will she get a reward if I gave out Sadaqah on her behalf?" He replied, "Yes." [Agreed upon; the wording is Muslim's].
Sunnah.com reference: Book 7, Hadith 224