Sahih al-Bukhari 2756
Sahih al-Bukhari · Book 55: Wills and Testaments (Wasaayaa) · If someone says, "My land is Sadaqa for Allah's safe on my mother's behalf,"
Narrated Ibn `Abbas:
حَدَّثَنَا مُحَمَّدٌ ، أَخْبَرَنَا مَخْلَدُ بْنُ يَزِيدَ ، أَخْبَرَنَا ابْنُ جُرَيْجٍ ، قَالَ أَخْبَرَنِي يَعْلَى ، أَنَّهُ سَمِعَ عِكْرِمَةَ ، يَقُولُ أَنْبَأَنَا ابْنُ عَبَّاسٍ ـ رضى الله عنهما ـ أَنَّ سَعْدَ بْنَ عُبَادَةَ ـ رضى الله عنه ـ تُوُفِّيَتْ أُمُّهُ وَهْوَ غَائِبٌ عَنْهَا، فَقَالَ يَا رَسُولَ اللَّهِ إِنَّ أُمِّي تُوُفِّيَتْ وَأَنَا غَائِبٌ عَنْهَا، أَيَنْفَعُهَا شَىْءٌ إِنْ تَصَدَّقْتُ بِهِ عَنْهَا قَالَ " نَعَمْ ". قَالَ فَإِنِّي أُشْهِدُكَ أَنَّ حَائِطِي الْمِخْرَافَ صَدَقَةٌ عَلَيْهَا.
The mother of Sa`d bin 'Ubada died in his absence. He said, "O Allah's Messenger (ﷺ)! My mother died in my absence; will it be of any benefit for her if I give Sadaqa on her behalf?" The Prophet (ﷺ) said, "Yes," Sa`d said, "I make you a witness that I gave my garden called Al Makhraf in charity on her behalf."