Muslims believe that Ishmael, not Isaac, is the chosen son of Abraham and the rightful heir of God's promises.

The Scriptures consistently affirm that God established His covenant with Isaac, not Ishmael. In Genesis 17:19, God explicitly states that His covenant will be established with Isaac, whom Sarah will bear. This is further reinforced in Genesis 21:12, where God instructs Abraham to listen to Sarah, as it is through Isaac that Abraham's offspring will be reckoned. The New Testament also echoes this sentiment, highlighting Isaac's unique role in God's redemptive plan. Additionally, while Ishmael is blessed and becomes a great nation, he does not inherit the covenant promises that are reserved for Isaac and his descendants. Furthermore, the narrative surrounding Abraham's sacrifice of Isaac (Genesis 22) underscores Isaac's significance as the beloved son through whom God's promises are fulfilled. The New Testament refers to Isaac as the only son whom Abraham loved, emphasizing the special relationship and the divine purpose attached to him. This distinction is crucial in understanding the lineage through which Jesus, the Messiah, ultimately comes. In conclusion, while Islam honors both Abraham's sons, the biblical text clearly delineates Isaac as the chosen son of promise, establishing a direct line to the fulfillment of God's covenant and the coming of Christ, which is central to Christian faith.