What is the ruling on impurity falling into a non-water liquid or solid?
Chapter on what purification is achieved with regarding water
Al-Mughni
Book of Purification
Primary text
If the impurity falls into a liquid substance, that substance becomes impure. If it falls into a solid substance, such as solidified fat, the impurity and the surrounding area must be removed, and the rest of the substance remains pure. This is based on the narration of Maymunah where the Prophet, peace be upon him, was asked about a mouse falling into fat and commanded, 'Throw it away and what is around it, and eat your fat.' Another narration from Abu Hurayrah states: 'If it is solid, throw it away and what is around it, but if it is liquid, do not approach it.'
Supporting text
A solid substance immune to widespread contamination is defined as one that is cohesive enough to prevent the parts of the impurity from spreading from the point of contact to other areas. Al-Marrudhi stated that Imam Ahmad considered honey-like syrups (Dushab) and Hijazi fat as solids if the impurity is removed along with surrounding parts, similar to fat. Ibn Aqil defined a solid as something whose parts do not flow out if its container is opened. The apparent meaning of the narrations from Ahmad suggests a less strict definition of solidity, aiming primarily to prevent the spread of impurity, which is achieved by the removal of the contaminated portion.