Sahih al-Bukhari, Volume 1, Book 4, Hadith 236 (USC-MSA) ⓘ
Narrated Maimuna: Allah's Messenger was asked regarding ghee (cooking butter) in which a mouse had fallen. He said, "Take out the mouse and throw away the ghee around it and use the rest."
حَدَّثَنَا إِسْمَاعِيلُ، قَالَ حَدَّثَنِي مَالِكٌ، عَنِ ابْنِ شِهَابٍ، عَنْ عُبَيْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ، عَنِ ابْنِ عَبَّاسٍ، عَنْ مَيْمُونَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم سُئِلَ عَنْ فَأْرَةٍ سَقَطَتْ فِي سَمْنٍ فَقَالَ " أَلْقُوهَا وَمَا حَوْلَهَا فَاطْرَحُوهُ. وَكُلُوا سَمْنَكُمْ " .
also referenced under: Book 4, Hadith 102 (In-Book) & Hadith 235 (DarusSalam)