Romans 9:6-8

New Catholic Bible

The Word of God Has Not Proved False. ⁶ It is not as though the word of God has proved false. For not all who were Israelites truly belong to Israel, ⁷ and not all of Abraham’s children are his true descendants. On the contrary, “It is through Isaac that descendants will bear your name.”

⁸ In other words, it is not through physical descent that people are regarded as children of God. Rather, the children of the promise are those who are counted as descendants.