Sahih Muslim 5294
صحيح مسلم#5294SahihIbn 'Abbas reported Allah's Messenger (may peace be upon him.) as saying:When any one of you eats food he should not wipe his hand until he has licked it or has it licked
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 36:168