Romans 4:12

Context
4:12 And he is also the father of the circumcised, ¹  who are not only circumcised, but who also walk in the footsteps of the faith that our father Abraham possessed when he was still uncircumcised. ² 

Romans 4:16

Context
4:16 For this reason it is by faith so that it may be by grace, ³  with the result that the promise may be certain to all the descendants – not only to those who are under the law, but also to those who have the faith of Abraham, ⁴  who is the father of us all