The history of Pre-Islamic Arabia before the rise of Islam in the 630s is not known in great detail. Archaeological exploration in the Arabian peninsula has been sparse; indigenous written sources are limited to the many inscriptions and coins from southern Arabia. Existing material consists primarily of written sources from other traditions (such as Egyptians, Greeks, Persians, Romans, etc.) and oral traditions later recorded by Islamic scholars. Many small kingdoms prospered from Red sea and Indian Ocean trade. Major kingdoms included the Sabaeans, Awsan, Lahkimid Himyar and the Nabateans. Arab kingdoms are occasionally mentioned in the Hebrew Old Testament under the name of Edom.