The Messenger of Allah ﷺ was asked about a mouse that falls into clarified butter. He said, "Take it out along with what is around it and throw it away."In another narration, he added, "And eat your butter."
أن رسول الله ﷺ سئل عن الفأرة تقع في السمن فقال: انزعوها وما حولها فاطرحوه. وزاد في رواية: وكلوا سمنكم.
Malik narrated it in the chapter on seeking permission (20) from Ibn Shihab, from Ubaydullah bin Abdullah bin Utba bin Masud, from Abdullah bin Abbas, from Maymuna, and he related it. Bukhari narrated it in the chapter on wudu (236) via Maen, from Malik, with the same wording. He added, Maen said, "Malik told us so many times that I cannot count them, saying, from Ibn Abbas, from Maymuna." The addition mentioned above is also found in Bukhari (235) from Ismail (that is, Ibn Abu Uways) from Malik, with the same chain.The description in some narrations states that the clarified butter was solid. Imam Ahmad narrated it (26803) from Muhammad bin Musab, who said, Uzai told us, from Zuhri, with his chain, and it contains, "in some solid clarified butter of theirs." Nasai likewise narrated it (4259) from Yaqub bin Ibrahim Dawraqi and Muhammad bin Yahya bin Abdullah Nisaburi, from Abdul-Rahman bin Mahdi, from Malik, from Zuhri, with his chain, and it contains, "in solid clarified butter."However, some scholars found fault with this addition on the grounds that it contradicts the companions of Malik, who did not mention it. But it is supported by what Abu Dawud Tayalisi narrated (2839) from Sufyan bin Uyayna, from Zuhri, from Ubaydullah bin Abdullah, from Ibn Abbas, that a mouse fell into some solid clarified butter belonging to the family of Maymuna, so the Prophet ﷺ ordered that the mouse and what was around it be removed. Hajjaj bin Minhal likewise narrated it, as reported by Bayhaqi in Marifa (19359), as did Ishaq bin Rahawayh in his Musnad, as mentioned in Talkhis (4/3), and it is also found in Ibn Hibban's Sahih (1392), both of them from Sufyan bin Uyayna with his chain, including this addition. Solid clarified butter is that from which what is around the mouse can be removed.On this subject, it is also narrated from Abu Hurairah that he said, the Messenger of Allah ﷺ said, "If a mouse falls into clarified butter, then if it is solid, throw it out along with what is around it, but if it is liquid, do not go near it." Abu Dawud narrated it (3842), and Ahmad (7601), and Ibn Hibban (1393-1394), all of them via Abdul-Razzaq, who said, Maamar informed us, from Zuhri, from Saeed bin Musayab, from Abu Hurairah, and he related it. It is also found in the Musannaf of Abdul-Razzaq (278), after which he said, "Maamar would also relate it from Zuhri, from Ubaydullah bin Abdullah bin Utba, from Ibn Abbas, from Maymuna, and Ibn Uyayna likewise informed us of it in this way." End of quote. So Maamar attributed it to the Musnad of Abu Hurairah, and for this reason Bukhari and others found fault with it.Tirmidhi said (1798), "Maamar narrated, from Zuhri, from Saeed bin Musayab, from Abu Hurairah, from the Prophet ﷺ, something similar to the hadith of Maymuna. This is a hadith that is not preserved. And I heard Muhammad bin Ismail say, the hadith of Maamar, from Zuhri... is a mistake. The correct version is the hadith of Zuhri, from Ubaydullah, from Ibn Abbas, from Maymuna."Others said, both routes are sahih. Ibn Hajar quoted in Fath al-Bari (9/668) from Dhahli that he affirmed both routes are sahih. I say, Ibn Hibban likewise graded it sahih and included it in his Sahih, while Baghawi in Sharh al-Sunnah (2812) contented himself with including the hadith of Abu Hurairah, then mentioned afterward Bukhari's criticism of it, but he did not, as was his usual practice, include the hadith of Maymuna found in the Sahih.In the narration of Abu Hurairah there is a useful addition, namely, "but if it is liquid, do not go near it," meaning in eating and consumption, because liquids other than water, when impurity falls into them, become impure whether the liquid is small or large in quantity, unlike water, which does not become impure through abundance so long as it is not altered by the impurity. For this reason, the scholars agreed that if oil has a mouse die in it, or some other impurity falls into it, it becomes impure and it is not permissible to eat it. As for benefiting from it, such as using it for lighting, that is permissible according to the correct view.