ENOfficial
Narrated Maimuna: The Prophet (ﷺ) was asked about a mouse that had fallen into butter-fat (and died). He said, "Throw away the mouse and the portion of butter-fat around it, and eat the rest."
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا عَبْدُ الْعَزِيزِ بْنُ عَبْدِ اللَّهِ، حَدَّثَنَا مَالِكٌ، عَنِ ابْنِ شِهَابٍ، عَنْ عُبَيْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ، عَنِ ابْنِ عَبَّاسٍ، عَنْ مَيْمُونَةَ ـ رضى الله عنهم ـ قَالَتْ سُئِلَ النَّبِيُّ صلى الله عليه وسلم عَنْ فَأْرَةٍ سَقَطَتْ فِي سَمْنٍ فَقَالَ " أَلْقُوهَا وَمَا حَوْلَهَا وَكُلُوهُ ".
sunnah.com