سنن النسائي

Ibn 'Awn said: "Muhammad used to say: 'In my view land is like the wealth put into a Mudarabah (limited partnership) contract. Whatever is valid with regard to the wealth put into a Mudarabah partnership, is valid with regard to land, and whatever is not valid with regard to the wealth put into a Mudarabah partnership, then it is not valid with regard to land.'" He said: "He did not see anything wrong with giving all of his land to the plowman on the basis that he would work with it himself, or with his children, and helpers, and oxen, and, that he would not spend anything on it; all expenses were to be paid by the owner of the land."