Galatians 3:9
So we see that it is those who possess faith that are blessed with believing Abraham.
Romans 4:16
All depends on faith, and for this reason--that acceptance with God might be an act of pure grace,
Romans 4:11
Before, not after. And he received circumcision as a sign, a mark attesting the reality of the faith-righteousness which was his while still uncircumcised, that he might be the forefather of all those who believe even though they are uncircumcised--in order that this righteousness might be placed to their credit;
Romans 4:24
it was for our sakes too. Faith, before long, will be placed to the credit of us also who are believers in Him who raised Jesus, our Lord, from the dead,
Galatians 3:7-8
Notice therefore that those who possess faith are true sons of Abraham.
Galatians 3:14
Our freedom has been thus purchased in order that in Christ Jesus the blessing belonging to Abraham may come upon the nations, so that through faith we may receive the promised Spirit.
Galatians 3:29
And if you belong to Christ, then you are indeed true descendants of Abraham, and are heirs in fulfilment of the promise.
Galatians 4:28
But you, brethren, like Isaac, are children born in fulfilment of a promise.