The Messenger of Allah ﷺ forbade drinking while standing.
أن رسول الله ﷺ نهى عن الشرب قائما.
No references are available.
Muslim narrated it in the Book of Drinks (2025:115) via Shubah, from Qatada, from Abu Isa Aswari, from Abu Saeed Khudri, and he mentioned it.