Sunan Ibn Majah, Book 30, Hadith 3547 (In-Book) ⓘ
It was narrated that Ibn ‘Abbas said: “The Messenger of Allah forbade drinking (directly) from the mouth of a water skin.”
حَدَّثَنَا بَكْرُ بْنُ خَلَفٍ أَبُو بِشْرٍ، حَدَّثَنَا يَزِيدُ بْنُ زُرَيْعٍ، حَدَّثَنَا خَالِدٌ الْحَذَّاءُ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، أَنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ نَهَى أَنْ يُشْرَبَ مِنْ فَمِ السِّقَاءِ .
also referenced under: Hadith 3421 (Reference) & Volume 4, Book 30, Hadith 3421 (DarusSalam)