Falāḥ (فلاح) is the Arabic word for salvation (especially from self-improvement), happiness and well-being. In Islamic contexts, according to the Qur'an,(Muslim's book) actions such as conforming to Allah's commands, establishing the Zakat (charity tax), not taking intoxicants and not gambling all lead to falāḥ.What is Falah? classicalislamgroup.com
References
External links
The Qur'anic Teachings - Falah
See also soteriology