Abu Huraira reported Allah's Messenger ﷺ as saying: When any one of you eats food he should lick his fingers, for he does not know in what part of the food sticking to his fingers the blessing lies.
This hadith also serves as a reminder for us to practice good hygiene while eating; by licking our fingers after each meal we can ensure that they remain clean and free from germs or bacteria which could cause harm if ingested. Furthermore, this hadith encourages us to show gratitude towards Allah for all of His blessings; no matter how small they may seem at first glance, they are still gifts from Him which deserve appreciation and thanksgiving.