A wagering contract or a risky contract. It applies to all those contracts which may bring a reward without any human effort or to contracts that involve non-business risks.
Al-yamin al-ghamus
Hagbad
Al-najiz
Al-mudarabah al-muqayyadah
Shart
Al-mustarsil
Al-ghanam
Irdabb
Mudarib
Al-fals