© 2025. The Book of Genesis  contains mostly historical accounts, but it also includes the origin of laws that God later gave to the Hebrews in their scripture. One prohibited eating meat with blood in it ( Genesis 9:4 , and later Deuteronomy 12:23), another commanded circumcising their males ( Genesis 17:10-14 , and later Leviticus 12:3). Although God blessed the 7th Day of the week, Saturday, in Genesis 2:3  it was later given to the Hebrews to observe as their Sabbath