(18) باب اسْتِحْبَابِ لَعْقِ الأَصَابِعِ وَالْقَصْعَةِ وَأَكْلِ اللُّقْمَةِ السَّاقِطَةِ بَعْدَ مَسْحِ مَا يُصِيبُهَا مِنْ أَذًى وَكَرَاهَةِ مَسْحِ الْيَدِ قَبْلَ لَعْقِهَا
Ibn 'Abbas reported Allah's Messenger (ﷺ) as saying:
When any one of you eats food he should not wipe his hand until he has licked it or got it licked by (someone else). (PT)
Reference (PT): Sahih Muslim 2031 b (PT)
In-book reference (PT): Book 36, Hadith 169 (PT)
USC-MSA web (English) reference(deprecated numbering scheme): Book 23, Hadith 5038 (PT)