Ali ibn Abi Talib · The Book on Zakat

the Messenger of Allah said: "I have exempted charity on horses and slaves. So bring charity for silver, one Dirham for every forty Dirham. There is nothing for me (to collect) on one hundred and ninety Dirham, so when it reaches two hundred, then five Dirham of it (are due)."

the Messenger of Allah said: "Whoever begs from the people while he has what he needs, he will come on the Day of Judgment and his begging with be scratches or lacerations, or bite marks on his face." They said: "O Messenger of Allah! 'How much is it that one needs?' He said: 'Fifty Dirham, or their value in gold.'"

"Al-Abbas asked the Messenger of Allah about paying his charity (Zakat) in advance before its time is due (by being in possession for a whole year), he permitted him to do that."

the Prophet said to Umar: "We have taken this year's Zakat from Al-Abbas in the previous year."