عَنِ ابْنِ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُمَا أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ شَرِبَ مِنْ زَمْزَمَ وَهُوَ قَائِمٌ وَفِي لَفْظٍ شَرِبَ مِنْ دَلْوٍ مِنْ زَمْزَمَ قَائِمًا
Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrates that the Messenger (peace and blessings of Allah be upon him) drank Zamzam water while standing, and in another narration: He (peace and blessings of Allah be upon him) drank Zamzam water from a bucket while standing.