Ruling on amputating an extra part of the human body

Q: What is the ruling on amputating a specific extra part of a person, such as an extra finger or something else? Is it to be thrown away with the waste, or should it be collected and a person be tasked with burying it in Muslim graveyards?

A: The matter is broad, for it does not have the ruling of a human being. There is no harm in placing it in the waste or burying it in the ground out of respect for it, and that is better. Otherwise, the matter is broad, and praise be to Allah, as we said. It is not obligatory to wash it or bury it, unless it is a fetus that has completed four months. As for a piece of flesh in which the soul has not been breathed, or a piece of a finger or the like, the matter is broad. However, burying it in good earth is better and more excellent.