That the mother of Saʿd bin Ubada the brother of Bani Saida died in Saʿd's absence, so he came to the Prophet saying, "O Messenger of Allah ﷺ! My mother died in my absence, will it benefit her if I give in charity on her behalf?" The Prophet ﷺ said, "Yes." Saʿd said, "I take you as my witness that I give my garden Al-Makhraf in charity on her behalf." (Using translation from Bukhārī 2762)
أَنَّ سَعْدَ بْنَ عُبَادَةَ تُوُفِّيَتْ أُمُّهُ وَهُوَ غَائِبٌ عَنْهَا فَأَتَى رَسُولَ اللهِ ﷺ فَقَالَ يَا رَسُولَ اللهِ إِنَّ أُمِّي تُوُفِّيَتْ وَأَنَا غَائِبٌ عَنْهَا يَنْفَعُهَا إِنْ تَصَدَّقْتُ عَنْهَا؟ قَالَ نَعَمْ قَالَ فَإِنِّي أُشْهِدُكَ أَنَّ حَائِطِي الْمِخْرَافَ صَدَقَةٌ عَنْهَا