The Messenger of Allah ﷺ said, "When one of you has eaten, let him not wipe his hand until he has licked it, for he does not know in which portion of his food the blessing lies."
حدثنا أبو معاوية حدثنا الأعمش عن أبي سفيان
قال رسول الله ﷺ إذا طعم أحدكم فلا يمسح يده حتى يمصها فإنه لا يدري في أي طعام يبارك له فيه