I heard Allah's Apostle (ﷺ) as saying: The Satan is present with any one of you in everything he does; he is present even when he eats food; so if any one of you drops a mouthful he should remove away anything filthy on it and eat it and not leave for the devil; and when he finishes (food) he should lick his fingers, for he does not know in what portion of his food the blessing lies.
Reference: Sahih Muslim 2033 d In-book : Book 36, Hadith 177 USC-MSA web (English) : Book 23, Hadith 5046 (deprecated)
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