That Messenger of Allah ﷺ said: "When one of you eats, then let him lick his fingers, for indeed he does not know in which of them is the blessing." He said: There are narrations on this topic from Jabir, Ka'b bin Malik, and Anas.  

قَالَ رَسُولُ اللَّهِ ﷺ إِذَا أَكَلَ أَحَدُكُمْ فَلْيَلْعَقْ أَصَابِعَهُ فَإِنَّهُ لاَ يَدْرِي فِي أَيَّتِهِنَّ الْبَرَكَةُ قَالَ وَفِي الْبَابِ عَنْ جَابِرٍ وَكَعْبِ بْنِ مَالِكٍ وَأَنَسٍ  

When any one of you eats food he should lick his fingers, for he does not know in what part of the food sticking to his fingers the blessing lies. (Using translation from Muslim 2035a)   

أَنَّ النَّبِيَّ ﷺ قَالَ إِذَا أَكَلَ أَحَدُكُمْ فَلْيَلْعَقْ أَصَابِعَهُ فَإِنَّهُ لَا يَدْرِي فِي أَيِّ ذَلِكَ الْبَرَكَةُ  

When any one of you eats food he should lick his fingers, for he does not know in what part of the food sticking to his fingers the blessing lies. (Using translation from Muslim 2035a)  

عَنِ النَّبِيِّ ﷺ قَالَ إِذَا أَكَلَ أَحَدُكُمْ فَلْيَلْعَقْ أَصَابِعَهُ فَإِنَّهُ لَا يَدْرِي فِي أَيَّتِهِنَّ الْبَرَكَةُ  

[Machine] From the Prophet Muhammad ﷺ , he said, "When one of you eats, let him lick his three fingers."  

عَنِ النَّبِيِّ ﷺ قَالَ «إِذَا أَكَلَ أَحَدُكُمْ فَلْيَلْعَقْ أَصَابِعَهُ الثَّلَاثَ»  

"إذا أكل أحدُكم طعامَه فلْيلعقْ أصابِعهَ فإنه لا يدرى في أي طعامِه تكون البركُةُ" .  

"إذا أكلَ أحدُكم الطعامَ فْليُمصَّ أصابِعَه فإنّه لا يدرى في أيِّ طعامهِ تكونُ البركةُ" .