Romans 4:11-18

And he received the sign of circumcision, and the seal of the righteousness of the faith which he had in uncircumcision: that he should be the father of all who believed, through uncircumcision; and righteousness should be imputed to them;

Galatians 3:28-29

There is no longer Jew nor Greek, nor bond nor free, nor male and female: for you are all one in Christ Jesus.

Treasury of Scripture Knowledge

Summary

As for me, behold, my covenant is with thee, and thou shalt be a father of many nations.

Bible References

A father

Romans 4:11
And he received the sign of circumcision, and the seal of the righteousness of the faith which he had in uncircumcision: that he should be the father of all who believed, through uncircumcision; and righteousness should be imputed to them;
Galatians 3:28
There is no longer Jew nor Greek, nor bond nor free, nor male and female: for you are all one in Christ Jesus.