It wasnarrated from Ibn 'Abbas that the Prophet (ﷺ) said:
"Whenoneof you eats food, let him not wipe his hand until he has licked itorhas someone else to lick it." (JA)
English reference (JA): Vol. 4, Book 29, Hadith 3269 (JA)
Arabic reference (JA): Book 29, Hadith 3393 (JA)