عَنْ أَبِي هُرَيْرَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «كُلُّ ذِي نَابٍ منَ السِّباعِ فأكلُه حرامٌ» . رَوَاهُ مُسلم

Abu Huraira reported God’s messsenger as saying, "When a fly alights in anyone’s vessel he should plunge it all in and then throw it away, for in one of its wings there is a cure and in the other disease." Bukhari transmitted it.