Abdullah bin Nafi' al-Sa'agh عبد الله بن نافع الصائغ المخزومي · The Book on Zakat

the Prophet said about Zakat on grapevines: "They are to be assessed just as the date-palm is assessed. Then its Zakat is paid in raisins just as the Zakat for the date-palm is paid in dried dates."

the Messenger of Allah would order paying the Zakat before going to the Salat on the day of Fitr.