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?