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

a mouse fell into some cooking fat and died. The Prophet was asked (about that) and he said: "Throw it away, and whatever is around it, and eat (the rest)."

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 ﷺ فَقَالَ " أَلْقُوهَا وَمَا حَوْلَهَا وَكُلُوهُ " .