Isaac: The Miraculous Son of Abraham

Then God said to Abraham, “As for Sarai your wife, do not call her Sarai, for her name is to be Sarah. …

Then the LORD appeared to Abraham by the Oaks of Mamre in the heat of the day, while he was sitting at the entrance of his tent. …

Now the LORD attended to Sarah as He had said, and the LORD did for Sarah what He had promised. …

But I took your father Abraham from beyond the Euphrates and led him through all the land of Canaan, and I multiplied his descendants. I gave him Isaac,

The sons of Abraham were Isaac and Ishmael.

Now you, brothers, like Isaac, are children of promise.

By faith Sarah, even though she was barren and beyond the proper age, was enabled to conceive a child, because she considered Him faithful who had promised.