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.‏

Anas ibn Malik said (may Allah be well pleased with him)

"The Prophet (Allah bless him and give him peace) used to breathe into the vessel three times when he drank, and he would say: 'It is more wholesome and more thirst-quenching!’”