NET
30 Since God is one, he will justify the circumcised by faith and the uncircumcised through faith.
Darby
30 since indeed [it is] one God who shall justify [the] circumcision on the principle of faith, and uncircumcision by faith.
KJV
30 Seeing [it is] one God, which shall justify the circumcision by faith, and uncircumcision through faith.