Sahih Muslim 2033 b
Kitabu cha Vinywaji
It is recommended to lick one's fingers and wipe the bowl, and to eat a piece of food that is dropped after removing any dirt on it. It is disliked to wipe one's hand before licking it, because of the possibility that the blessing of the food may be in that remaining part. The Sunnah is to eat with three fingers
Jabir reported Allah's Messenger (ﷺ) as saying: When any one of you drops a mouthful he should pick it up and remove any of the filth on it, and then eat it, and should not leave it for the Satan, and should not wipe his hand with towel until he has licked his fingers, for he does not know in what portion of the food the blessing lies.
Tafsiri ya Kiswahili ya hadithi hii bado haipatikani — inaonyeshwa kwa Kiingereza.