وَعَنْ كَعْبِ بْنِ مَالِكٍ
قَالَ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَأْكُلُ بِثَلَاثَةِ أَصَابِعَ وَيَلْعَقُ يَدَهُ قَبْلَ أَن يمسحها
God’s messenger used to eat with three fingers and lick his hand before wiping it.
Mishkat al-Masabih 3998, Book 22, Foods, Hadith 6. 1 min read