From Islamic Finance WIKI
Also Maysir in Arabic. Gambling; An agreement which will enable gain for a party and loss for the other party when a certain event/events happens.
Verses about Gambling
"They ask you about wine and gambling. Say, 'In them is great sin and [yet, some] benefit for people. But their sin is greater than their benefit.'" (Qur'an, al-Baqara 2:219)
"O you believe: wine, gambling, idols, and fortune-telling arrows are but filth of the Devil's handiwork, so shun them..." (Qur'an, al-Maidah, 5:90)