Narrated Abu Sa`id Al-Khudri: I heard Allah's Apostle forbidding the drinking of water by bending the mouths of water skins, i.e., drinking from the mouths directly.
Hadith ReferenceSahih Bukhari / The Book of Drinks / Hadith: 5626
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة