'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. (PT)
English reference (PT): Book 4, Hadith 626 (PT)
Arabic reference (PT): Book 4, Hadith 601 (PT)