Mukhtasar Sahih Bukhari — Hadith 175

Narrated from Ummul Momineen Maimunah (may Allah be pleased with her) that Allah’s Messenger (peace and blessings be upon him) was asked about a mouse that had fallen into clarified butter (ghee). He (peace and blessings be upon him) said: “Remove it and also remove the (ghee) around where it fell, and use the rest of the ghee.”