Rabi’ah bin Shayban (may Allah have mercy on him) says that I asked Sayyiduna Imam Hasan (may Allah be pleased with him), “Do you remember any sayings of the Prophet (peace and blessings be upon him)?” He replied, “I remember that once I picked up a date from the charity and put it in my mouth. The Prophet (peace and blessings be upon him) said: ‘Throw it away, for it is not lawful for the Messenger of Allah (peace and blessings be upon him) and his family.’”
Hadith Referenceمسند احمد / مسند اهل البيت رضوان الله عليهم اجمعين / 1724