Mukhtasar Bukhari

Narrated from Sayyiduna Ali (may Allah be pleased with him) that he came to the door of the platform (in the mosque of Kufa) and drank while standing, then said: "Indeed, some people consider it disliked to drink water while standing, whereas I myself saw the Prophet (peace and blessings of Allah be upon him) drinking in this manner, just as you have seen me drinking."