It is narrated from Sa'id bin al-Musayyib (may Allah have mercy on him) that the Messenger of Allah (peace and blessings be upon him) ordered 'Attab bin Asid (may Allah be pleased with him) to estimate the yield of grapes just as the yield of dates is estimated, and then to collect the zakat of grapes in the form of raisins, just as the zakat of fresh dates is collected in the form of dried dates. He says, this was the blessed practice of the Messenger of Allah (peace and blessings be upon him) regarding the collection of zakat on dates and grapes.