Sahih al-Bukhari 5540
Sahih al-Bukhari · Book 72: Hunting, Slaughtering · If a mouse falls into solid or liquid butter-fat
Narrated Maimuna:
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 " .
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."