Riyad as-Salihin

Riyad as-Salihin 768

Permission to Drink While Standing
The Book About the Etiquette of Eating Search within the hadiths
Riyad as-Salihin 768
Arabic hadith text
وعن ابن عمر رضى الله عنهما قال‏:‏كنا نأكل على عهد رسول الله صلى الله عليه وسلم ونحن نمشى ، ونشرب ونحن قيام‏.‏((رواه الترمذي))
Translation
Ibn 'Umar (May Allah be pleased with them) reported

During the lifetime of the Messenger of Allah (ﷺ) we would eat while walking and would drink while standing.[At- Tirmidhi].