al-Zuhri ابن شهاب الزهري‎, محمد بن مسلم · The Chapters Regarding Zakat

the Messenger of Allah said: “When you pay Zakat on your wealth, then you have done what is required to you.”

Ibn Shihab said: “Salim read to me a letter that the Messenger of Allah had written concerning Sadaqat, before Allah caused him to pass away, in which it was said: 'For five camels one sheep; for ten, two sheep; for twenty, four sheep. For twenty five, a Bint Makhad(a one year old she-camel), up to thirty-five; if there is no Bint Makhad, then a Bin Labun ( a two-year-old male camel). If there are more than thirty-five even one, then…

Abu Bakr Siddiq wrote to him: “In the name of Allah, the Most Gracious, the Most Merciful. This is the obligation of Sadaqah which the Messenger of Allah enjoined upon the Muslims, as Allah commanded the Messenger of Allah. The ages of camels to be given (in Zakat) may be made up in sheep. So if a man has camels on which the Sadaqah is a Jadha'ah (a four-year-old she-camel) and he does not have a Jadha'ah but he has…

Umar bin Khattab said: “Did you not hear the Messenger of Allah when he mentioned Ghulul with the Sadaqah (and said): 'Whoever steals a camel or a sheep from it, he will be brought carrying it on the Day of Resurrection?' ” Abdullah bin Unais said: “Yes.”

Shu'aib, form his father, that his grandfather said: “The Messenger of Allah only prescribed Zakat on these five things: wheat, barley, dates, raisins and corn.”

the Messenger of Allah (ﷺ) said: “For crops that are irrigated by the sky (i.e. rain) and springs, one-tenth. For those that are irrigated by watering, one half of one-tenth.”