مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3162
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Ibn 'Abbas (رضي الله عنه) that The Prophet (ﷺ) drank from Zamzam whilst standing.
Musnad Ahmad 3186Its isnad is saheeh, al-Bukhari (5617) and Muslim (2027)]