Generations of Noah in the tradition, being claimed as the ancestors of much of northern Europe. According to Joseph Blenkinsopp, the 70 names in the list express symbolically the unity of humanity, corresponding to the 70 descendants of Israel who go down into Egypt with Jacob at and the 70 elders of Israel who visit God with Moses at the covenant ceremony in . Chapters 1–11 of the Book of Genesis are structured around five "toledot" statements ("these are the generations of..."), of which the "generations of the sons of Noah, Shem, Ham, and Japheth" is the fourth. Events before the Genesis flood
Shem-Tob ben Isaac of Tortosa the four seasons of the year. According to the superstitions of his time, he believed in the influence of the planets on man; and accordingly an entire treatise deals with astrology. His translation was undertaken with the view of spreading medical science among the Jews, so that they might not be dependent on Christian physicians (comp. 'Ab. Zarah ii.2). The translation is not literal; and in this Shem-Ṭob departed from the method of the earlier translators. As to the various names of diseases and medicaments, Shem-Ṭob employs all that he could find in the Bible and in Talmudic literature. Others