The Prophet ﷺ used to eat with three fingers and not wipe his before licking it. (Using translation from Abū Dāʾūd 3848)  

«كَانَ النَّبِيُّ ﷺ يَأْكُلُ بِثَلَاثِ أَصَابِعَ وَلَا يَمْسَحُ يَدَهُ حَتَّى يَلْعَقَهَا»  

[Machine] "The Prophet ﷺ used to eat with his three fingers, and when he finished, he would lick them." Hisham also pointed with his three fingers.  

«أَنَّ النَّبِيَّ ﷺ كَانَ يَأْكُلُ بِأَصَابِعِهِ الثَّلَاثِ فَإِذَا فَرَغَ لَعِقَهَا» وَأَشَارَ هِشَامٌ بِأَصَابِعِهِ الثَّلَاثِ