The Prophet (peace and blessings be upon him) said:
"The charities of the Muslims (that is, the zakah on livestock) are to be collected at their springs and watering places (where they come to drink water)."
Hadith Referenceصحیح الجامع الصغیر / حرف التاء / 2904
Hadith Gradingالألبانی:صحيح
Hadith Takhrij[حم هـ] عن ابن عمرو. الصحيحة ١٧٧٩: الطيالسي، هق. هق - عائشة.