It is narrated from Sayyiduna Ali (may Allah be pleased with him) that he called for a cup of water, then said: "Where are those people who dislike drinking while standing?"
The narrator says: Sayyiduna Ali (may Allah be pleased with him) took hold of it (the cup) and drank while standing. Then he performed a light ablution and wiped over his sandals, then said: "the Messenger of Allah (peace and blessings be upon him) did it like this, as long as one has not broken his ablution."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 355