Malik related to me from Said ibn Amr Shurahbil ibn Said ibn Sadibn Ubada from his father that his father said, ''Sad ibn Ubada wentout with the Messenger of Allah, may Allah bless him and grant himpeace, in one of his raids and his mother was dying in Madina. Someonesaid to her, 'Leave a testament.' She said, 'In what shall I leave atestament? The property is Sad's property.' Then she died before Sadreturned. When Sad ibn Ubada returned, that was mentioned to him. Sadsaid,'Messenger of Allah! Will it help her if I give sadaqafor her?' The Messenger of Allah, may Allah bless him and grant himpeace, said, 'Yes' Sad said, 'Such-and-such a garden is sadaqa forher,' naming the garden."
USC-MSA web (English) reference: Book 36, Hadith 52
Arabic reference: Book 36, Hadith 1455