(18) باب اسْتِحْبَابِ لَعْقِ الأَصَابِعِ وَالْقَصْعَةِ وَأَكْلِ اللُّقْمَةِ السَّاقِطَةِ بَعْدَ مَسْحِ مَا يُصِيبُهَا مِنْ أَذًى وَكَرَاهَةِ مَسْحِ الْيَدِ قَبْلَ لَعْقِهَا
'Abdullah b. Ka'b reported that his father Ka'b narrated to him that Allah's Messenger (ﷺ) used to eat with three fingers and when he had finished (eating), he licked them. (ES)
Reference (ES): Sahih Muslim 2032 c (ES)
In-book reference (ES): Book 36, Hadith 172 (ES)
USC-MSA web (English) reference(deprecated numbering scheme): Book 23, Hadith 5041 (ES)