Malik related to me from Ibn Shihab from Ubaydullah ibn Abdullahibn Utba ibn Masud from Abdullah ibn Abbas from Maimuna, the wife ofthe Prophet, may Allah bless him and grant him peace, that theMessenger of Allah, may Allah bless him and grant him peace, was askedabout a mouse falling into clarified butter. He said, "Remove it andthrow away what is around it "
USC-MSA web (English) reference: Book 54, Hadith 20
Arabic reference: Book 54, Hadith 1785