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-muqtat
Al-murw'ah
Al-kailjah
Al-maks
Al-tasarruf
Al-hajjaji
Al-tas‘ir
Al-’aqilah
Al-tu‘mah
Al-muhtakir