The Messenger of Allah ﷺ said, "When one of you eats, he should not wipe his hand with a napkin until he licks it or has it licked."
حدثنا يحيى عن ابن جريج قال أخبرني عطاء
قال رسول الله ﷺ إذا أكل أحدكم فلا يمسح يده بالمنديل حتى يلعقها أو يلعقها
Its isnad is sahih. It is a repetition of 1924, and see 2672.