[Machine] Saad ibn Ubada was with the Messenger of Allah ﷺ in some of his battles. When the death of Umm Saad approached, she was told to make her will. She asked, "To whom should I make my will?" They replied, "To Saad ibn Ubada." However, she died before Saad arrived. When Saad came and was informed about what had happened to his mother, he went to the Prophet ﷺ and informed him about his mother's situation. He asked the Prophet, "Will it benefit her if I give charity on her behalf?" The Messenger of Allah ﷺ replied, "Yes." So Saad donated a wall, named as such, as charity on her behalf.
أَنَّ سَعْدَ بْنَ عُبَادَةَ كَانَ مَعَ رَسُولِ اللهِ ﷺ فِي بَعْضِ مَغَازِيهِ فَحَضَرَتْ أُمَّ سَعْدٍ الْوَفَاةُ فَقِيلَ لَهَا أَوْصِي فَقَالَتْ فِيمَ أُوصِي؟ إِنَّمَا الْمَالُ مَالُ سَعْدٍ فَمَاتَتْ قَبْلَ أَنْ يَقْدَمَ سَعْدٌ فَلَمَّا قَدِمَ سَعْدٌ فَخُبِّرَ بِالَّذِي كَانَ مِنْ شَأْنِ أُمِّهِ فَأَتَى النَّبِيَّ ﷺ فَأَخْبَرَهُ بِالَّذِي كَانَ مِنْ شَأْنِ أُمِّهِ وَقَالَ يَا رَسُولَ اللهِ أَيَنْفَعُهَا أَنْ أَتَصَدَّقَ عَنْهَا؟ فَقَالَ رَسُولُ اللهِ ﷺ نَعَمْ فَقَالَ سَعْدٌ حَائِطُ كَذَا وَكَذَا سَمَّاهُ صَدَقَةٌ عَنْهَا