Compiled by Imam Yahya ibn Sharaf al-Nawawi
وعن ابن عباس رضى الله عنهما قال: سقيت النبي صلى الله عليه وسلم من زمزم، فشرب وهو قائم .((متفق عليه))
I served the Messenger of Allah (ﷺ) Zamzam water to drink and he drank it while he was standing. [Al-Bukhari and Muslim].