Isaac was the promised son born through Sarah, proving Jehovah’s covenant faithfulness and defining Abraham’s true covenant line.
Genesis 22:2 — Was Abraham Commanded to Sacrifice Isaac or Ishmael? Who Really Was Abraham’s “Only Son”?
Genesis 22 identifies Isaac—not Ishmael—as Abraham’s “only son,” the covenant heir, and the prophetic type of Christ’s sacrifice.
Birth of Isaac and Departure of Hagar and Ishmael (Genesis 21:1–21)
Ishmael’s mocking of Isaac was persecution against the covenant heir, leading to his expulsion and the preservation of God’s redemptive plan.

