Ibn Ka'b b. Malik reported on the authority of his father that the Messenger of Allah ﷺ used to eat (food) with three fingers and he licked his hand before wiping it (with towel).  

كَانَ رَسُولُ اللَّهِ ﷺ يَأْكُلُ بِثَلاَثِ أَصَابِعَ وَيَلْعَقُ يَدَهُ قَبْلَ أَنْ يَمْسَحَهَا  

'Abdullah b. Ka'b reported that his father Ka'b narrated to him that Messenger of Allah ﷺ used to eat with three fingers and when he had finished (eating), he licked them.  

أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ يَأْكُلُ بِثَلاَثِ أَصَابِعَ فَإِذَا فَرَغَ لَعِقَهَا  

The Prophet ﷺ used to eat with three fingers and not wipe his before licking it.  

أَنَّ النَّبِيَّ ﷺ كَانَ يَأْكُلُ بِثَلاَثِ أَصَابِعَ وَلاَ يَمْسَحُ يَدَهُ حَتَّى يَلْعَقَهَا  

Ibn Ka'b b. Malik reported on the authority of his father that the Messenger of Allah ﷺ used to eat (food) with three fingers and he licked his hand before wiping it (with towel). (Using translation from Muslim 2032b)   

كَانَ رَسُولُ اللهِ ﷺ يَأْكُلُ بِثَلَاثِ أَصَابِعَ وَلَا يَمْسَحُ يَدَهُ حَتَّى يَلْعَقَهَا  

The Prophet ﷺ said, 'When you eat, do not wipe your hands till you have licked it, or had it licked by somebody else." (Using translation from Bukhārī 5456)  

أَنَّ النَّبِيَّ ﷺ قَالَ «إِذَا أَكَلَ أَحَدُكُمْ فَلَا يَمْسَحْ يَدَهُ حَتَّى يَلْعَقَ أَصَابِعَهُ أَوْ يُلْعِقَهَا »  

Ibn Ka'b b. Malik reported on the authority of his father that the Messenger of Allah ﷺ used to eat (food) with three fingers and he licked his hand before wiping it (with towel). (Using translation from Muslim 2032b)   

كَانَ رَسُولُ اللهِ ﷺ يَأْكُلُ بِثَلَاثِ أَصَابِعَ وَيَلْعَقُ يَدَهُ قَبْلَ أَنْ يَمْسَحَهَا  

"إذا أكلَ أحدُكم فلا يمسحْ يدَه حتى يلعَق أصابِعه الثلاثَ".