Anas (May Allah be pleased with him) reported:
The Prophet (ﷺ) forbade us from drinking while standing. Qatadah reported: "We asked him: 'What about eating?"' He said: "That is even worse, (or may be he said) more detestable."Another narration is: The Messenger of Allah (ﷺ) reprimanded [us] for drinking while standing.[Muslim].