Anas reported Allah's Apostle (ﷺ) disapproved the drinking of water while standing.
Sahih Muslim Book 36, Hadith 148
← Previous Hadith This hadith has been reported from Zuhri with the same chain of transmitters, but he also said that Ikhtinath means that its head (i. e., of the waterskin) be turned upside down and then (water) be drank from that.

Sahih Muslim Book 36, Hadith 147 Next Hadith → We said to him: What about eating? Thereupon he (Anas) said: That is even worse and more detestable (abominable).

Sahih Muslim Book 36, Hadith 149