I gave Zamzam water to Messenger of Allah ﷺ and he drank it while standing. ʿAsim (a sub-narrator) said that ʿIkrima took the oath that on that day the Prophet ﷺ had not been standing but riding a camel.
قَالَ سَقَيْتُ رَسُولَ اللَّهِ ﷺ مِنْ زَمْزَمَ فَشَرِبَ وَهُوَ قَائِمٌ قَالَ عَاصِمٌ فَحَلَفَ عِكْرِمَةُ مَا كَانَ يَوْمَئِذٍ إِلاَّ عَلَى بَعِيرٍ