He reported God’s Messenger as saying, “If anyone has property [[given him for the use of himself and his descendants it belongs to the one to whom it is given and does not return to the one who gave it because he gave a gift which may be inherited.”
He said that the life-tenancy which God’s Messenger allowed was (only that one should say, “It is for you and your descendants.” When he says, “It is yours as long as you live,” it returns to its owner.
