Anas reported Allah's Apostle (ﷺ) disapproved the drinking of water while standing.
Anas reported that Allah's Apostle (ﷺ) forbade that a person should drink while standing. Qatada reported
We said to him: What about eating? Thereupon he (Anas) said: That is even worse and more detestable (abominable).
This hadith is reported on the authority of Anas with a different chain of transmitters, but no mention is made of the words of Qatada.
Abu Sa'id Khudri reported that Allah's Messenger (ﷺ) warned against drinking while standing.
Abu Huraira reported Allah's Messenger (ﷺ) as saying
None of you should drink while standing; and if anyone forgets, he must vomit.