After Abraham, the next two patriarchs of the children of Israel are Isaac and Jacob. Isaac was got by Abraham after many years of barrenness which was experienced by Sarah. Isaac was got by him when, naturally, it was impossible for Sarah to be pregnant. When Abraham had got Ishmael by Hagar, Sarah's maidservant, and thought that Ishmael would be his heir, God let him know that his heir, Isaac, was yet to come; and Isaac was born. Later in his life, Isaac called Jacob (his son) and blessed him, and charged him, and said to him: ..".May God Almighty bless you, and make you fruitful and multiply you, that you may be an assembly of peoples; and give you the blessing of Abraham, to you and your descendants with you, that you may inherit the land in which you are a stranger, which God gave to Abraham."