The Prophet ﷺ said, "It is among the rights of camels that they be milked at the watering place."
عن النبي ﷺ قال: من حق الإبل أن تحلب على الماء.
Bukhari narrated it in the Book of Sharecropping (2378) from Ibrahim bin Munzir, who said, Muhammad bin Fulayh told us, who said, my father told me, from Hilal bin Ali, from Abdul-Rahman bin Abu Amrah, from Abu Hurairah, who said, and then he mentioned it.His saying, "is milked," means for whoever among the poor happens to be present there. The milking was specifically mentioned in connection with the watering place so that it would be easier for the needy person than seeking out the houses, and more convenient for the livestock. Fath al-Bari (3/265).