It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that I heard the Messenger (peace and blessings of Allah be upon him) say: The blood of one who dies from an animal's wound is wasted; the blood of one who dies by falling into a well is wasted; the blood of one who dies in a mine is also wasted. And for the buried treasure (rikaz) that someone finds, one-fifth (khums) is obligatory. Whoever buys a goat (and is deceived) whose udders have been tied, he has the choice of two things: either he keeps the animal with himself (and settles the matter), or he returns the animal to the owner and gives along with it one sa’ of dates.

And whoever buys a sheep and finds it to be muṣarrāh, then he has the choice: if he wishes, he may return it and (give) a sā‘ of dates.