Romans 9:10

And not only so, but also when Rebekah had conceived children by one man, our forefather Isaac,

Not only that, but Rebekah’s children were conceived at the same time by our father Isaac.

This son was our ancestor Isaac. When he married Rebekah, she gave birth to twins.

And not only this, but also when Rebecca conceived children by one man, Isaac our father—

And not only this; but when Rebecca also had conceived by one, even by our father Isaac;