'Amro bin Shu'aib narrated on the authority of his father, who reported on the authority of his grandfather (RAA) that the Messenger of Allah (ﷺ) said:
"The Zakah of the Muslims should be collected by their water trough." Related by Ahmad. (FR)
English reference (FR): Book 4, Hadith 626 (FR)
Arabic reference (FR): Book 4, Hadith 601 (FR)