Of all the stories available in the Torah that the sages of old could have chosen to read on Rosh Hashanah, the last one would have been the two chapters that they chose – the exile of Ishmael and Hagar, and the binding of Isaac on Mount Moriah (Genesis chapters 21 and 22). It is impossible to understand the binding of Isaac without understanding the previous narrative concerning Sarah, Hagar, and Ishmael. The former could be seen as leading to the latter. There are striking parallels, as well as significant differences between the two. The first difference, perhaps among the most important, is the force that moves the story forward. 

“Sarah saw the son of Hagar the Egyptian, whom she had borne unto Abraham, making sport. She said to Abraham: ‘Cast out this maidservant and her son; for the son of this maidservant shall not be heir with my son, Isaac.’ The thing was very grievous in Abraham’s sight on account of his son. But God said to Abraham: “Let it not grieve you, because of the youth, or because of your maidservant; everything that Sarah says to you, listen to her; for in Isaac shall seed be called to you. As for the maidservant’s son, I will also make a nation, because he is your seed” (Genesis 21:9).

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