Ash-Shama'il Al-Muhammadiyah, Book 31, Hadith 198 (English) ⓘ
Amr ibn Shu'aib radiyallahu anhu relates from his father, and he from his (Amr's) grandfather, that he said, I had seen Rasoolullah sallallahu alaihe wasallam drinking water whilst standing and also whilst sitting.
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، قَالَ: حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، عَنْ حُسَيْنٍ الْمُعَلِّمِ، عَنْ عَمْرِو بْنِ شُعَيْبٍ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، قَالَ: رَأَيْتُ رَسُولَ اللهِ صلى الله عليه وسلم، يَشْرَبُ قَائِمًا، وَقَاعِدًا.
also referenced under: Book 32, Hadith 207 (In-Book)