"O Messenger of Allah, my mother died; will it benefit her if I give in charity on her behalf?" He said: "Yes." He said: "I have a garden and I ask you to bear witness that I am giving it in charity on her behalf."
Reference: Sunan an-Nasa'i 3655 In-book : Book 30, Hadith 45 English translation : Vol. 4, Book 30, Hadith 3685
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