سُنَنُ ابْنِ مَاجَهْ
Sunan Ibn Majah 501
The Book of Purification and its Sunnah
Rinsing the mouth due to drinking milk
حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ السَّوَّاقُ، حَدَّثَنَا الضَّحَّاكُ بْنُ مَخْلَدٍ، حَدَّثَنَا زَمْعَةُ بْنُ صَالِحٍ، عَنِ ابْنِ شِهَابٍ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ حَلَبَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ شَاةً وَشَرِبَ مِنْ لَبَنِهَا ثُمَّ دَعَا بِمَاءٍ فَمَضْمَضَ فَاهُ وَقَالَ إِنَّ لَهُ دَسَمًا .
It was narrated that Anas bin Malik said: "The Messenger of Allah milked a sheep and drank some of its milk, then he called for water and rinsed his mouth and said: 'It has some greasiness in it.'"
Sunan Ibn Majah, 501Da'if (Darussalam)