The Book Of Jubilees
The Covenant Is Established Trough Yitshaq
Pg. 66 19-25
And Alahym said: 'Yea, and Sharah also shall bear thee a son, and thou shalt call his name Yitshaq , and I will establish My covenant with him, an everlasting covenant, and for his seed after him. And as for Yishmael also have I heard thee, and behold I will bless him, and make him great, and multiply him exceedingly, and he shall beget twelve princes, and I will make him a great nation. But My covenant will I establish with Yitshaq, whom Sharah shall bear to thee, in these days, in the next year.
And He left off speaking with him, and Alahym went up from Abraham.
And Abraham did according as Alahym had said unto him, and he took Yishmael his son, and all that were born in his house, and whom he had bought with his money, every male in his house, and circumcised the flesh of their foreskin.
And on the same day was Abraham circumcised, and all the men of his house, and those born in the house, and all those, whom he had bought with money from the children of the stranger, were circumcised with him.
This law is for all the generations forever, and there is no circumcision of the days, and no omission of one day out of the eight days; for it is an eternal ordinance, ordained and written on the heavenly tablets.
Abraham other offspring from his 3rd wife Keturah Pg. 80 12-13
And Yishmael and his sons, and the sons of Keturah and their sons, went together and dwelt from Paran to the entering in of Babylon in all the land which is towards the East facing the desert. And these mingled with each other, and their name was called Arabs, and Yishmaelites.
Traits of Esua & Yaqob
Barashith/ Genesis 25:27
And the boys grew: and Esau was a cunning hunter, a man of the field; and Jacob was a plain man, dwelling in tents.
From The Book Of Jubilees, according to the Targums, The tents were the academies. Yaqob Is represented as a life Long student Of the turah, while Esau refused to learn to read or write, therby refusing to study the scriptures. In other words Yaqob was a man of YAHUAH, while Esau was a man of the world.