Sahih Muslim Book 5, Hadith Number 2342.

Chapter : The posterity of the Holy Prophet (may peace be upon him) is not allowed to make use of Sadaqa.

Abu Huraira reported Allah’s Messenger (may peace be upon him) as saying: I go back to my family and I find a date lying on my bed. I then take it up to eat it, but then I throw it away fearing that it may be a Sadaqa.