The Book of Jubilees, also known as 'Little Genesis' or 'Kufale', is a pseudepigraphal text of the Old Testament that rewrites the history of Genesis and part of Exodus, with emphasis on the division of time into jubilees and weeks of years. It is canonical only in the Ethiopian Orthodox Tewahedo Church and preserved entirely in Ge'ez. The book was originally written in Hebrew around the 2nd century BC and is cited by the Early Church Fathers.
Jubilees
Chapter 20
And in the forty-second jubilee, in the first year of the seventh week, Abraham called Ishmael and his twelve sons, and Isaac and his two sons, and the six sons of Keturah, and their sons.
And he commanded them that they should observe the way of the Lord; that they should practice justice and righteousness.
That they should circumcise their sons according to the covenant which He made with them, and not turn aside to the right or to the left from all the ways which the Lord commanded us; and that we should guard ourselves from all fornication and impurity.
And if any woman or maidservant commits fornication among you, burn her with fire and do not let them commit fornication with her according to their eyes and their heart; and do not let them take for themselves wives from the daughters of Canaan, because the descendants of Canaan shall be exterminated from the earth.
And he told them about the judgment of the Giants, and about the judgment of the Sodomites, how they had been judged because of wickedness, and had died because of fornication, and impurity, and mutual corruption by fornication.
"And guard yourselves from all fornication and impurity, and from all pollution of sin, so that you do not make our name a curse, and your own lives a hissing, and your children to be destroyed by the sword, and you become cursed like Sodom, and your remnant like the sons of Gomorrah.
I implore you, my sons, love the God of heaven and be firm in all His commandments. And do not follow the idols, nor all their filthiness.
And do not make for yourselves molten or graven gods. Because they are vanity, and there is no spirit in them; because they are the work of the hand, and all who believe in them believe in nothing, do not serve them nor worship them.
But serve the Most High God and worship Him continually. And hope in His countenance, and practice righteousness and justice before Him. May He be pleased with you and grant you His mercy, and send the rain upon you morning and evening, and bless all the work you do upon the earth, and bless your bread and your water, and bless the fruit of your womb and the fruit of your land, and the herds of your animals, and the flocks of your sheep.
And you shall be a blessing upon the earth. And all the nations of the earth shall desire you, and shall bless their children in my name, so that they may be blessed as I am.
And he gave to Ishmael and his sons, and to the sons of Keturah, gifts, and sent them away from Isaac his son, and he gave everything to Isaac his son.
And Ishmael and his sons and the sons of Keturah and his sons went together and dwelt from Paran to the entrance of Babylon in all the land that is to the west facing the desert.
And these mingled with one another, and their name was called Arabs and Ishmaelites.