Hadith 1227:2
Abu Mu'awiyah narrated to us, he said: Hisham ibn 'Urwah narrated to us, from 'Abd al-Rahman ibn Sa'd, from Ibn Ka'b ibn Malik, from his father, who said: "The Messenger of Allah, may Allah bless him and grant him peace, used to eat with three fingers, and he would not wipe his hand until he had licked it."
حدثنا أبو معاوية، قال: حدثنا هشام بن عروة، عن عبد الرحمن بن سعد، عن ابن كعب بن مالك، عن أبيه قال: " " كان رسول الله صلى الله عليه وسلم يأكل بثلاث أصابع ولا يمسح يده حتى يلعقها " "