عن ابنِ عَبَّاسٍ : أنَّ النَّبِيَّ (صلى الله عليه و سلم ) شَرِبَ لَبَناً فَدَعاَ بِمَاءٍ فَتَمَضْمَضَ ثُمَّ قَالَ : (( إِنَّ لَهُ دَسَمًا )).
Ibn Abbas (may Allaah be pleased with him) narrated the Prophet (peace and blessings be upon him) drank some milk then called for some water. Once he got the water he rinsed his mouth then said, "It has fat."
[Collected by Bukhari 211 and Muslim 358]
Lessons from this hadith:
Imam An-Nawwawee said," This hadeeth confirms it is recommended to rinse the mouth after drinking milk." [Sharh Saheeh Muslim ]
Abu Dawud mentioned this hadeeth in his Sunan.
Shaykh Al-Uthaymeen said, "The reason why the Prophet (peace and blessings be upon him) rinsed his mouth was because of the fat. It can be understood from this action that it is legislated to rinse the mouth from all foods which contain fat, regardless of whether they are drunk or eaten. Its good manners to rinse the mouth afterwards to remove the fat. If the substance is heavy in fat, then it is better to use the siwak. For this reason the scholars say: it's sunnah to use siwak to remove any fat after eating if the smell of the mouth changed. [Sharh Saheeh Al-Bukahri ]
