Muwatta Malik · Hadith 1683

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 ibn al-Khattab and Ali ibn Abi Talib and Uthman ibn Affan drank while standing

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).