In consequence of their Semitic descent, the Jews of Arabia possessed many points of similarity with the primitive inhabitants of the country. Their language was closely related to Arabic, and their customs, except those that had been produced by their religion, were not different from those of the sons of Arabia. The Jews became, therefore, so thoroughly Arabic that they were distinguished from the natives of the country only by their religious belief. Intermarriage between the two nations tended to heighten the similarity of their characters. Like the Himyarites, the Jews of southern Arabia applied themselves more particularly to the trade between India, the Byzantine empire, and Persia. The Jews of northern Arabia, on the contrary, led the life of Bedouins; they occupied themselves with agriculture, cattle breeding, transport by caravan, traffic in weapons, and probably also the calling of robbers. The Arabian Jews likewise possessed a patriarchal, tribal constitution. Several families were united under one name, and led by a chieftain (shaïch), who in times of peace settled controversies and pronounced judgment, and in war commanded all the men able to bear arms, and concluded alliances with neighboring tribes. Like the Arabs, the Jews of the peninsula extended their hospitality to every one who entered their tents, and held inviolable faith with their allies; but they shared also the faults of the original inhabitants of the peninsula, avenging the death of one of their number with rigorous inflexibility, and hiding in ambush in order to surprise and annihilate their enemy. It would sometimes happen that a Jewish tribe, having entered into an alliance with an Arabian clan, would find itself opposed to a kindred tribe which had espoused another cause. But even though Jews were at feud with each other, their innate qualities moderated in them Bedouin ferocity, which never extended mercy to a foe. They ransomed the prisoners of a kindred tribe with which they happened to be at war, from the hands of their own allies, being unwilling to abandon them as slaves to heathens, "because," said they, "the redemption of such of our co-religionists as are prisoners is a religious duty." Besides being equal to the Arabs in bravery, the Jews also contended with them for the palm in poetry. For in addition to manliness and courage, poetry was cultivated among the Arab nobles; it was fostered by the chieftains, and richly rewarded by the Arab kings. Next to the warrior, the poet was the man most honored in Arabia; for him all hearts and tents opened wide. The Jews of Arabia were likewise able to speak with elegance the Arabic language, and to adorn their poetry with rhymes.