—in some of its forms.

Sixth: A hired worker is either exclusively retained or shared, yet this contract falls under neither of those headings, for no specific work lies in his liability that he must fulfill, nor is he obliged to place himself at the disposal of the contracting party.

Seventh: In a lease, the wage becomes due the moment the contract is concluded and is earned upon delivery, whereas here no compensation becomes obligatory by the contract, nor is it earned by delivery.

Eighth: A hired worker may delegate the task to a substitute who acts in his stead and still earns the wage, but the contestant may not do so.

Ninth: If someone were to hire himself to perform a task on condition that the other hire himself to perform an equivalent task, the lease would be invalid; yet a racing contract is valid only on precisely that basis—without it, there is no race contract at all. Likewise (1), if he were to say, “If you hit nine out of ten, you shall receive such-and-such,” this is not a wager but merely a voluntary promise concerning a work from which he (alone, or he together with others) benefits, or else it is a juʿālah, (2) in which case he is bound by what he has undertaken.

Tenth: The hired worker strives to fulfill the hirer’s objective, while the bettor is most eager for the very opposite of his opponent’s aim—namely, to defeat him and take his money.