The Covenant with Ishmael
"I will establish My covenant between Me and you and your descendants after you throughout their generations as an everlasting covenant, to be God to you and to your descendants after you." Genesis 17:7
"And as for Ishmael, I have heard thee: Behold, I have blessed him, and will make him fruitful, and will multiply him exceedingly; twelve princes shall he beget, and I will make him a great nation." ... He shall father twelve princes, and I will make him into a great nation." Genesis 17:20
"This is my covenant, which ye shall keep, between me and you and thy seed after thee; Every man child among you shall be circumcised." ... Genesis 17:10
Genesis 17:23 "And Abraham took Ishmael his son, and all that were born in his house, and all that were bought with his money, every male among the men of Abraham's house; and circumcised the flesh of their foreskin in the selfsame day, as God had said unto him."
The Right of First Born
1. Deuteronomy 21:15 "If a man has two wives, and he loves one but not the other, and both bear him sons but the firstborn is the son of the wife he does not love"
2. Deuteronomy 21:16 "When he wills his property to his sons, he must not give the rights of the firstborn to the son of the wife he loves in preference to his actual firstborn, the son of the wife he does not love.
3. Deuteronomy 21:17 "He must acknowledge the son of his unloved wife as the firstborn by giving him a double share of all he has. That son is the first sign of his father’s strength. The right of the firstborn belongs to him"