¹⁸ even though God had told him, “Isaac is the son through whom your descendants will be counted.”^[a]

⁷ Being descendants of Abraham doesn’t make them truly Abraham’s children. For the Scriptures say, “Isaac is the son through whom your descendants will be counted,”^[a] though Abraham had other children, too.

¹² But God told Abraham, “Do not be upset over the boy and your servant. Do whatever Sarah tells you, for Isaac is the son through whom your descendants will be counted.

¹⁹ But God replied, “No—Sarah, your wife, will give birth to a son for you. You will name him Isaac,^[a] and I will confirm my covenant with him and his descendants as an everlasting covenant.