It is narrated from Umm al-Mu'mineen Sayyida Maymunah (may Allah be pleased with her) that a mouse fell into ghee and died. The Messenger of Allah (peace and blessings be upon him) said: "Remove the mouse and the ghee around it and throw them away, and eat the remaining ghee."
In a narration of Nasa’i, it is also reported from Umm al-Mu’minin Sayyidah Maymunah radi Allahu anha that the Prophet sallallahu alayhi wa sallam said: “If the clarified butter (ghee) is solidified, then remove the ghee from around it, and if it is melted, then do not go near it at all.”