(16) باب الشُّرْبِ قَائِمًا
Narrated An-Nazzal bin Sabra:
`Ali offered the Zuhr prayer and then sat down in the wide courtyard (of the Mosque) of Kufa in order to deal with the affairs of the people till the `Asr prayer became due. Then water was brought to him and he drank of it, washed his face, hands, head and feet. Then he stood up and drank the remaining water while he was standing. and said, "Some people dislike to drink water while standing thought the Prophet did as I have just done."
Reference: Sahih al-Bukhari 5616
In-book reference: Book 74, Hadith 42
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 7, Book 69, Hadith 520