Sayyiduna Abu Hurayrah (may Allah be pleased with him) says that the Messenger of Allah (peace and blessings be upon him) said: "I return to my family and find a date fallen on my bed or in my house, and I pick it up to eat it, but then I fear that it may be from the charity (sadaqah), so I throw it away."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 10818