Sahih al-Bukhari Book 69, Hadith 4
The Prophet (ﷺ) 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 recover,
so that some people may benefit by you and others be harmed by you."
The Prophet (ﷺ) said, "The one who looks after a widow or a poor person is like a Mujahid (warrior) who fights for Allah's Cause, or like him who performs prayers all the night and fasts all the day."
"The Prophet (ﷺ) said, 'The best alms is that which is given when one is rich, and a giving hand is better than a taking one, and you should start first to support your dependents.' A wife says, 'You should either provide me with food or divorce me.' A slave says, 'Give me food and enjoy my service." A son says, "Give me food; to whom do you leave me?" The people said, "O Abu Huraira! Did you hear that from Allah's Messenger (ﷺ) ?" He said, "No, it is from my own self."