عن أبي سعيدٍ الخُدْرِيِّ رضي الله عنه قال: نهى رسولُ اللهِ صلى الله عليه وسلم عن اخْتِنَاثِ الأَسْقِيَةِ.
The Prophet (may Allah's peace and blessings be upon him) forbade turning the waterskins upside down and then drinking from their mouths, because they may contain harmful things that could enter one's stomach and harm him.
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