Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates: Dates of zakat were brought to the service of Sayyiduna Abu al-Qasim (peace and blessings of Allah be upon him). Sayyiduna Imam Hasan bin Ali (may Allah be pleased with him) took one of those dates and put it in his mouth. The Noble Prophet (peace and blessings of Allah be upon him) put his two fingers in his mouth and took it out, and said: O my son, spit it out. Do you not know that zakat is not lawful for us?
Hadith Referenceصحیح ابن حبان / كتاب الزكاة / 3295
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - انظر ما قبله.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرط مسلم
Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates: The Prophet Muhammad (peace and blessings be upon him) would sometimes pass by a fallen date, but he would not pick it up out of concern that it might be from the zakat.
Hadith Referenceصحیح ابن حبان / كتاب الزكاة / 3296
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - «صحيح أبي داود» (1457)، «الضعيفة» تحت الحديث (6467).فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح