'Descendants' in the Bible

For the promise that he would inherit the world did not come to Abraham or to his descendants through the Law, but through the righteousness produced by faith.

Therefore, the promise is based on faith, so that it may be a matter of grace and may be guaranteed for all of Abraham's descendants not only for those who were given the Law, but also for those who share the faith of Abraham, who is the father of us all.

Hoping in spite of hopeless circumstances, he believed that he would become "the father of many nations," just as he had been told: "This is how many descendants you will have."

and not all of Abraham's descendants are his true descendants. On the contrary, "It is through Isaac that descendants will be named for you."

That is, it is not merely the children born through natural descent who were regarded as God's children, but it is the children born through the promise who were regarded as descendants.

Isaiah also calls out concerning Israel, "Although the descendants of Israel are as numerous as the grains of sand on the seashore, only a few will be saved.

It is just as Isaiah predicted: "If the Lord of the Heavenly Armies had not left us some descendants, we would have become like Sodom and would have been compared to Gomorrah."