Sahih al-Bukhari 5621

Sa'id ibn al-Harith related from Jabir ibn 'Abdullah that the Prophet, may Allah bless him and grant him peace, visited a one of the Ansar with a companion. The Prophet, may Allah bless him and grant him peace, and his companion greeted him and the man returned the greeting and said, 'Messenger of Allah, may my father and mother be your ransom. This is a hot time.' The man was watering his garden. The Prophet, may Allah bless him and grant him peace, said, 'Do you have water kept overnight in a skin? Otherwise we will drink directly from the water.' The man was watering his garden and the man said, 'Messenger of Allah, I have some water kept overnight on a skin.' He went to the shed and poured some water in a cup and then milked some milk from a sheep of his he kept at home. The Prophet, may Allah bless him and grant him peace, drank and then returned it, and the man who had come with him drank."