Volume 2 · Book 26 · Hadith 701
Narrated Ibn Abbas: I gave Zam-zam water to Allah's Apostle and he drank it while standing. 'Asia (a sub-narrator) said that 'Ikrima took the oath that on that day the Prophet had not been standing but riding a camel.
— Sahih Bukhari, Volume 2, Book 26: Pilgrimmage (Hajj), Hadith #701