Sunan Ibn Majah, Book 30, Hadith 3542 (In-Book) ⓘ
It was narrated from Anas that he used to drink from a vessel in three draughts, and Anas said that the Messenger of Allah used to drink from a vessel in three draughts.
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا ابْنُ مَهْدِيٍّ، حَدَّثَنَا عَزْرَةُ بْنُ ثَابِتٍ الأَنْصَارِيُّ، عَنْ ثُمَامَةَ بْنِ عَبْدِ اللَّهِ، عَنْ أَنَسٍ، أَنَّهُ كَانَ يَتَنَفَّسُ فِي الإِنَاءِ ثَلاَثًا وَزَعَمَ أَنَسٌ أَنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ كَانَ يَتَنَفَّسُ فِي الإِنَاءِ ثَلاَثًا .
also referenced under: Hadith 3416 (Reference) & Volume 4, Book 30, Hadith 3416 (DarusSalam)