Romanos 9

In other words, those who are the sons of God are not those who are sons of the flesh, but those who are sons of the Promise; these are considered to be the offspring.

Quiere decir: No los que son hijos de la carne, éstos son los hijos de Dios; mas los que son hijos de la promesa, son contados en la generación.

That is, They which are the children of the flesh, these are not the children of God: but the children of the promise are counted for the seed.

That is, it is not the children of the flesh who are children of God, but the children of the promise are counted as heirs.