حَدَّثَنَا أَحْمَدُ بْنُ مَنِيعٍ، قَالَ‏:‏ حَدَّثَنَا هُشَيْمٌ، قَالَ‏:‏ حَدَّثَنَا عَاصِمٌ الأَحْوَلُ، وَمُغِيرَةُ، عَنِ الشَّعْبِيِّ، عَنِ ابْنِ عَبَّاسٍ‏:‏ أَنَّ النَّبِيَّ صلى الله عليه وسلم، شَرِبَ مِنْ زَمْزَمَ، وَهُوَ قَائِمٌ‏.‏

'Amr ibn Shu'aib reports on the authority of his father that his grandfather said

"I saw Allah's Messenger (Allah bless him and give him peace) drink while both standing and sitting.”