Saad bin Ubada, the brother of Banu Saida, was away when his mother died. He came to the Prophet ﷺ and said, "Messenger of Allah, my mother has died while I was absent. Will anything benefit her if I give it in charity on her behalf?"He replied, "Yes."Saad said, "Then I call you to witness that my orchard, al-Mikhraf, is a charity on her behalf."
أن سعد بن عبادة أخا بني ساعدة توفيت أمه، وهو غائب، فأتى النبي ﷺ، فقال: يا رسول الله، إن أمي توفيت، وأنا غائب عنها، فهل ينفعها شيء إن تصدقت به عنها؟ قال: نعم. قال: فإني أشهدك أن حائطي المخراف صدقة عليها.
Bukhari narrated it in the Book of Bequests (2762), from Ibrahim bin Musa, who said, Hisham bin Yusuf informed us that Ibn Jurayj informed them, saying, Yaala informed me that he heard Ikrima, the freedman of Ibn Abbas, saying, Ibn Abbas told us, and then he mentioned it.