Ibn 'Abbas (May Allah be pleased with them) reported:
Messenger of Allah ﷺ said, "When one of you finishes eating, he should not wipe his fingers until he has licked them himself or has given them to someone else to lick for him."

[Al-Bukhari and Muslim].

عن ابن عباس رضى الله عنهما قال: قال رسول الله ﷺ:
"إذا أكل أحدكم طعاماً، فلا يمسح أصابعه حتى يلعقها أو يلعقها". .