Four centuries afterward it fell to the lot of Moses to legislate on the Jewish morals, no doubt sadly corrupted by their sojourn in Egypt. His command is formal and emphatic: "Do not prostitute thy daughter, lest the land fall to whoredom.... There shall be no whore of the daughters of Israel."[8] He was equally decided in his condemnation of worse practices, to which it would appear the Jews were much addicted.[9] He laid penalties on uncleanness of every kind, and on fornication; but it would appear that he rather confirmed than abrogated the customary right of a Jewish father to sell his daughter as a concubine.[10] With the practical view of improving the physical condition of the race, Moses guarded, by elaborate laws, against improper and corrupt unions. Adultery and rape he punished with death. The bride was bound, under pain of death by stoning, to prove to the satisfaction not only of her husband, but of the tribe, that she had been chaste to the day of her marriage.[11] A long list of relatives were specified among whom it was illegal to intermarry. Furthermore, Moses endeavored, with marked zeal, to check the progress of disease among both sexes. Whether the maladies mentioned in Leviticus[12] were syphilitic in their nature, it were difficult to say. Modern medical science admits that, in hot climates, want of cleanliness and frequent amorous indulgence will generate phenomena similar to the "issue" so frequently mentioned by Moses. However this be, it is certain that both Jews and Jewesses were subject to diseases apparently similar to the common gonorrhoea; that these diseases were infectious; and that Moses, in reiterated injunctions, forbade all sexual intercourse, and almost all association, with persons thus afflicted. So earnest was his desire to eradicate the evil from the people, that he extended his prohibition to women during the period of their menstrual visitation.