صحيح مسلم
Sahih Muslim
كتاب الأشربة
The Book of Drinks
باب اسْتِحُبَابِ لَعْقِ الْأَصَابِعِ وَالْقَصْعَةِ ، وَأَكُلِ اللُّقْمَةِ السَّاقِطَةِ بَعْدَ مَسْحِ مَا يُصِيبُهَا مِنّ أَذًي ، وَّكَراهَةِ مَسْح الْيَدِ قَبْلَ لَعْقِهَا لِاحْتِمَالِ كَوْنِ بَرَكَةِ الطَّعَامِ فَي ذٰلِكَ الْبَاقِي وَ أَنَّ السُّنَّةُ الْأَكْلُ بِثَلَاثِ أَصَابِعَ
Chapter: 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
Hadith 2032
This hadith is listed as number 5299 in Maktaba Shamila
وحَدَّثَنَاه أَبُو كُرَيْبٍ ، حَدَّثَنَا ابْنُ نُمَيْرٍ ، حَدَّثَنَا هِشَامٌ ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ سَعْدٍ ، أَنَّ عَبْدَ الرَّحْمَنِ بْنَ كَعْبِ بْنِ مَالِكٍ ، وَعَبْدَ اللَّهِ بْنَ كَعْبٍ ، حَدَّثَاهُ أَوْ أَحَدُهُمَا عَنْ أَبِيهِ كَعْبِ بْنِ مَالِكٍ ، عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ بِمِثْلِهِ .
A hadith like this has been reported on the authority of Ka'b bin Malik through another chain of transmitters.
