Volume 7, Book 64, Number 266:
Narrated Sad:
The Prophet visited me at Mecca while I was ill. I said (to him), “I have property; May I bequeath
all my property in Allah’s Cause?” He said, “No.” I said, “Half of it?” He said, “No.” I said, “One third of
it?” He said, “One-third (is alright), yet it is still too much, for you’d better leave your inheritors
wealthy than leave them poor, begging of others. Whatever you spend will be considered a Sadaqa
for you, even the mouthful of food you put in the mouth of your wife. Anyhow Allah may let you re –
cover, so that some people may benefit by you and others be harmed by you.”