Hadith # 769
Ibn 'Umar (May Allah be pleased with them) reported: During the lifetime of Messenger of Allah (PBUH) we would eat while walking and would drink while standing.
[At-Tirmidhi]
Commentary
The Companions would not habitually eat something while being on the move and drink water in a standing position. In fact, the Hadith simply tells us that these were some moments in their life when they did so. The Ahadith that follow show that drinking in a standing posture is deprecated.
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