حَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ عُمَرَ بْنَ الْخَطَّابِ، وَعَلِيَّ بْنَ أَبِي طَالِبٍ، وَعُثْمَانَ بْنَ عَفَّانَ، كَانُوا يَشْرَبُونَ قِيَامًا ‏.‏

Yahya related to me from Malik that he had heard that Umar ibnal-Khattab and Ali ibn Abi Talib and Uthman ibn Affan drank whilestanding. Translation Not Available

Book Ref: Muwatta Imam Malik Book 49 Hadith 1686
Web Ref:  Muwatta Imam Malik Book 49 Hadith 13