Sahih Muslim
The Book of Drinks (Kitab Al-Ashriba)
Book Number: 023 / Hadith Number: 5039
Ibn Ka'b b. Malik reported on the authority of his father that he saw Allah's Messenger (may peace be upon him) licking his three fingers (after having finished the food). Ibn Hatim made no mention of" three". This hadith is also narrated through another chain of transmitters.