Gods covenant with Isaac and Ishmael
God establishes His everlasting covenant specifically through Isaac, not Ishmael, in
Genesis 17:19-21, declaring, "But my covenant I will establish with Isaac, whom Sarah shall bear to you". While God blesses Ishmael to be a great nation (Gen. 17:20), the covenant promises of land, descendants, and the messianic line are passed exclusively to Isaac, a distinction confirmed in Genesis 21:12 and reinforced in the New Testament (Romans 9:7-9).
Based on Genesis 17:19-21,
God established His everlasting covenant specifically through Isaac, the son of Abraham and Sarah, rather than Ishmael. While Ishmael was blessed and made into a great nation, God stated the covenant, including the promised land and the lineage of the Messiah, would pass through Isaac. Key Aspects of the Covenant Distinction:
- The Covenant Promise: God explicitly told Abraham, "I will establish my covenant with [Isaac], which Sarah shall bear unto thee" (Genesis 17:21).
- Isaac as the "Child of Promise": Isaac represents the supernatural fulfillment of God's promise, as he was born to Sarah in her old age, whereas Ishmael was born of human effort (Hagar).
- Status of Ishmael: While not the heir of the specific covenantal promise, God acknowledged Abraham’s plea for Ishmael, promising to make him fruitful and a great nation (father of twelve princes).
- Different Lineages: Isaac is recognized as the ancestor of the Jewish people and the line leading to Jesus, while Ishmael is traditionally considered the father of the Arab people.
Therefore, the Bible highlights that Isaac was chosen to carry forward the covenant promises.
But the treatment of Ishmael in God's book is much kinder than the treatment of Ishmael by so many of God's people. There are two very significant texts: in Genesis, Ishmael is blessed (Gen 16:11-12), and explicitly stated to be the fulfillment of one of God's promises to Abraham (Gen 21:13 cf. 17:5-6).