It is narrated from Jabir (may Allah be pleased with him) that the Prophet Muhammad (peace and blessings be upon him) said: "When any of you eats food and a morsel falls down, he should remove from it whatever is disliked, and then eat it; he should not leave it for Satan." Imam Tirmidhi says:
There is also a narration from Anas in this chapter.

Abu Hurairah (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings of Allah be upon him) said: "When any one of you eats food, let him lick his fingers, for he does not know in which of them the blessing is." __QUR_N__

Imam Tirmidhi says:
1- This hadith is Hasan Gharib.
2- I asked Muhammad bin Isma'il al-Bukhari about this hadith, and he said: This hadith of Abdul Aziz is of the category of Mukhtalif, and it is only known through his narration.
3- In this chapter, hadiths have also been narrated from Jabir, Ka'b bin Malik, and Anas (may Allah be pleased with them). We know it from this chain only through the narration of Suhail.

Anas (may Allah be pleased with him) reports that when the Prophet (peace and blessings of Allah be upon him) ate food, he would lick his three fingers. He said: "When any of you drops a morsel, he should remove the dirt from it and eat it, and not leave it for Satan." He instructed us to lick the plate and said: "You do not know in which part of your food the blessing lies." __REF_N__ Imam Tirmidhi says:
This hadith is hasan ghareeb sahih.