The Prophet ﷺ said, "When one of you uses stones to clean himself, let him use an odd number. When a dog drinks from one of your vessels, let him wash it seven times. No one should withhold surplus water in order to prevent others from grazing their animals on the surrounding pasture. And it is among the rights of camels that they be milked at the watering place on the day they come to drink."
حدثنا موسى بن داود حدثنا فليح بن سليمان عن هلال بن علي عن عبد الرحمن بن أبي عمرة
عن النبي ﷺ قال إذا استجمر أحدكم فليوتر وإذا ولغ الكلب في إناء أحدكم فليغسله سبع مرات ولا يمنع فضل ماء ليمنع به الكلأ ومن حق الإبل أن تحلب على الماء يوم وردها
Narrated by Muslim on the authority of Jabir, and by Suyuti in Jami Saghir, who marked it with the symbol for sahih.