It is narrated from Hazrat Anas (may Allah be pleased with him) that sometimes the Prophet (peace and blessings be upon him) would find a date lying on the road, and the Prophet (peace and blessings be upon him) would say: If I did not fear that it might be from charity, I would have eaten it.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 12913