أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنِ الزُّهْرِيِّ، عَنْ عُبَيْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ، عَنِ ابْنِ عَبَّاسٍ، عَنْ مَيْمُونَةَ، أَنَّ فَأْرَةً، وَقَعَتْ، فِي سَمْنٍ فَمَاتَتْ فَسُئِلَ النَّبِيُّ صلى الله عليه وسلم فَقَالَ ‏"‏ أَلْقُوهَا وَمَا حَوْلَهَا وَكُلُوهُ ‏"‏ ‏.‏

It was narrated from Ibn' Abbas, from Maimunah, that

the Prophet was asked about a mouse that fell into the cooking fat. He said: "If it (the fat) is solid, then throw it away, and whatever is around it. If it is liquid then do not use it at all."(Daif)