When any one of you eats food he should not wipe his hand until he has licked it or has it licked*. (Using translation from Muslim 2031a)
قَالَ رَسُولُ اللهِ ﷺ إِذَا أَكَلَ أَحَدُكُمْ طَعَامًا فَلَا يَمْسَحْ يَدَهُ فِي الْمِنْدِيلِ حَتَّى يَلْعَقَهَا أَوْ يُلْعِقَهَا فَإِنَّهُ لَا يَدْرِي فِي أَيِّ طَعَامِهِ الْبَرَكَةُ