Bismillah.
Narrated Abu Huraira (radiallaahu `anhu):
Allah's Apostle (sallallaahu `alayhi wasallam) said, "There is no compensation for one killed or wounded by an animal or by falling in a well, or because of working in mines; but Khumus is compulsory on Rikaz."
As for the first part of the Hadith, scholars explain that if someone gets hurt (or their property gets damaged) because of another's animal or by falling in a well, or because of working in mines, there are two possible reasons:
- Either the owner of that animal/well/mine was responsible;
- Or he/she was not.
In case the owner was responsible (e.g. he was guiding the animal), he'll pay compensation for the loss from his own wealth. And if he was not responsible, no compensation is due on him. More on it here.
Rikaaz refers to what is buried in the earth of the wealth of the Jaahiliyyah. The people of the Jaahiliyyah are the ones who existed before the coming of the Prophet (peace and blessings of Allaah be upon him), no matter what religion they followed. Islam has enjoined that when it is extracted, the khums be paid on it, as zakaah according to some scholars and as fay’ according to others. The rest belongs to whoever extracted it, if it was extracted from land that he owns, or from ruins or common land such as the street and so on.
Taken from: http://ilookilisten.wordpress.com/2012/12/31/compensation-rikaaz-and-khumus-hadith-no-1275/