The Messenger of Allah ﷺ said, "When a morsel of food falls from one of you, let him remove whatever harm has gotten on it and eat it. He should not leave it for Satan, nor should he wipe his hand with a napkin until he has licked it himself or had it licked, for he does not know in which part of his food the blessing lies."
حدثنا أبو نعيم حدثنا سفيان عن أبي الزبير
قال رسول الله ﷺ إذا سقطت من أحدكم لقمة فليمط ما أصابها من الأذى ولا يدعها للشيطان ولا يمسح يده بالمنديل حتى يلعقها أو يلعقها فإنه لا يدري في أي طعامه البركة