مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3506
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn 'Abbas (رضي الله عنه) said: The Messenger of Allah (ﷺ) came to the well of Zamzam and we gave him some to drink, and he drank standing.
Musnad Ahmad 3529Its isnad is saheeh, al-Bukhari (1637) and Muslim (2027)]