Genesis17:7 (KJV)
And I will establish my covenant between Me and thee and thy seed after thee in their generations for an everlasting covenant, to be a God unto thee, and to thy seed after thee
Genesis17:8 (KJV)
And I will give unto thee, and to your seed after thee,the land wherein thou art a stranger, all the land of Canaan, for an everlasting possession; and I will be their God.
Genesis 17:12 (KJV)
And he that is eight days old shall be circumcised among you, every man child in your generations, he that is born in the house or bought with money of any stranger, which is not of thy seed.
Genesis 17:13 (KJV)
He that is born I'm thy house, and he that is bought with thy money, must needs to be circumcised: and my covenant shall be in your flesh for an everlasting covenant.
Genesis 17:14
But an uncircumcised male who is not circumcised in the flesh of his foreskin, that person shall be cut off from his people; he has broken My covenant."
Genesis 17:16 (KJV) - And I will bless her, and give thee a son also of her: yea, I will bless her, and she shall be a mother of nations; kings of people shall be of her.
17 Then Abraham fell upon his face, and laughed, and said in his heart, Shall a child be born unto him that is an hundred years old? and shall Sarah, that is ninety years old, bear?
Genesis 17:19 (KJV)
And God said, Sarah thy wife shall bear thee a son indeed; and thou shalt call his name Isaac: and I will establish my covenant with him for an everlasting covenant, and with his seed after him.
Genesis 17:20, 20 As for Ishmael, I have heard you. I will indeed bless him, make him fruitful, and give him a multitude of descendants. He will become the father of twelve princes; I will make him into a great nation.- NET
Genesis 17:23 (KJV)
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 who were in Abrahan's house; and circumcised the flesh of their foreskin; in the selfsame day as God had said unto him.