Fadak
Fadak is an oasis east of Khaybar, set in a depression among the black volcanic rocks of the Hijaz. Springs and fertile ground supported palm groves and crops, giving the settlement a reputation for fine dates. Its remains include stone walls, forts and inscriptions; the neighbouring oasis of Yadi lay to the south.
In the seventh century Fadak was inhabited by a Jewish community. After the campaign against Khaybar, its inhabitants made terms with Muhammad and agreed to yield a share of their produce. Following his death, Fadak became the subject of a dispute involving his daughter Fatimah and the caliph Abu Bakr. The oasis also gave its name to a textile mentioned in early Islamic accounts, a reminder that its produce was not confined to dates.