It wasnarrated from Abu Hurairah that the Prophet (ﷺ) said:
"If aflyfalls into your drink, dip it into it then throw it away, for ononeof its wings is a disease and on the other is a cure." (ID)
English reference (ID): Vol. 4, Book 31, Hadith 3505 (ID)
Arabic reference (ID): Book 31, Hadith 3634 (ID)