Sahih Muslim
The Book of Zakat (Kitab Al-Zakat)
Book Number: 005 / Hadith Number: 2342
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.