Romans 9:7-8
they are not all children of Abraham because they are descended from Abraham. No, it is through Isaac that your offspring shall be reckoned ??8 meaning that instead of God's children being the children born to him by natural descent, it is the children of the Promise who are reckoned as his true offspring.
Romans 9:25-26
As indeed he says in Hosea, Those who were no people of mine, I will call 'my People,' and her 'beloved' who was not beloved;
2 Corinthians 6:17-18
Therefore come away from them, separate, saith the Lord, touch not what is unclean; then I will receive you,
Galatians 3:26-29
you are all sons of God by your faith in Christ Jesus