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.'"

حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ السَّوَّاقُ، حَدَّثَنَا الضَّحَّاكُ بْنُ مَخْلَدٍ، حَدَّثَنَا زَمْعَةُ بْنُ صَالِحٍ، عَنِ ابْنِ شِهَابٍ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ حَلَبَ رَسُولُ اللَّهِ ﷺ شَاةً وَشَرِبَ مِنْ لَبَنِهَا ثُمَّ دَعَا بِمَاءٍ فَمَضْمَضَ فَاهُ وَقَالَ " إِنَّ لَهُ دَسَمًا " .