Why is the concept of being 'a daughter of Abraham' important for Christians?

In Luke 13:16, Jesus refers to the healed woman as a 'daughter of Abraham,' emphasizing her spiritual heritage and role within the covenant family of faith. This identity extends beyond ethnicity, as it means she is part of the faithful, chosen by God, and reflects the promise made to Abraham. For Christians, this designation highlights the unity of all believers in Christ, who fulfills the promises of the Old Testament. It reassures believers of their position in God's redemptive plan, affirming that they, too, are heirs to the promises and blessings that come through faith.