Sahih al-Bukhari 5456
Book 70: Food, Meals · Narrated by Ibn `Abbas
Arabic
حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ، حَدَّثَنَا سُفْيَانُ، عَنْ عَمْرِو بْنِ دِينَارٍ، عَنْ عَطَاءٍ، عَنِ ابْنِ عَبَّاسٍ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " إِذَا أَكَلَ أَحَدُكُمْ فَلاَ يَمْسَحْ يَدَهُ حَتَّى يَلْعَقَهَا أَوْ يُلْعِقَهَا ".
English translation
Narrated Ibn `Abbas:The Prophet (ﷺ) said, 'When you eat, do not wipe your hands till you have licked it, or had it licked by somebody else
Reference: Sahih al-Bukhari 5456, Book of Food, Meals. English translation by Dr. Muhammad Muhsin Khan.