Far? (Arabic: ) or farah () in Islam is a religious duty commanded by God. The word is also used in Urdu , Persian, Pashto, Turkish (spelled farz), Malay (spelled fardu or fardhu) in the same meaning. Muslims who obey such commands or duties are said to receive hasanat (?), ajr () or thawab (?) each time for each good deed.
Fard or its synonym w?jib (?) is one of the five types of ahkam () into which fiqh categorizes acts of every Muslim. The Hanafi fiqh, however, makes a distinction between wajib and fard, the latter being obligatory and the former merely necessary.
Individual duty or far? al-'ayn () relates is required to perform, such as daily prayer (salat), and the pilgrimage to Mecca at least once in a lifetime (hajj).  An individual not performing this will be punished in the afterlife (but can be excused on basis of incapability), but if he enjoins and fulfils its necessity will be rewarded. 
Sufficiency duty or far? al-kif?ya ( ?) is a duty which is imposed on the whole community of believers (ummah). The classic example for it is janaza: the individual is not required to perform it as long as a sufficient number of community members fulfill it.