Romans 11:24

11:24 For if you were cut off from what is by nature a wild olive tree, and grafted, contrary to nature, into a cultivated olive tree, how much more will these natural branches be grafted back into their own olive tree?

Romans 11:21

11:21 For if God did not spare the natural branches, perhaps he will not spare you.

Romans 2:27

2:27 And will not the physically uncircumcised man ¹  who keeps the law judge you who, despite ²  the written code ³  and circumcision, transgress the law?

Romans 1:26

1:26 For this reason God gave them over to dishonorable passions. For their women exchanged the natural sexual relations for unnatural ones, ⁴ 

Romans 2:14

2:14 For whenever the Gentiles, ⁵  who do not have the law, do by nature ⁶  the things required by the law, ⁷  these who do not have the law are a law to themselves.

¹ tn Grk “the uncircumcision by nature.” The word “man” is supplied here to make clear that male circumcision (or uncircumcision) is in view.

² tn Grk “through,” but here the preposition seems to mean “(along) with,” “though provided with,” as BDAG 224 s.v. διά A.3.c indicates.

³ tn Grk “letter.”

¹ tn Grk “for their females exchanged the natural function for that which is contrary to nature.” The term χρῆσις (crhsi") has the force of “sexual relations” here (L&N 23.65).

¹ sn Gentile is a NT term for a non-Jew.

² tn Some (e.g. C. E. B. Cranfield, Romans [ICC], 1:135-37) take the phrase φύσει (fusei, “by nature”) to go with the preceding “do not have the law,” thus: “the Gentiles who do not have the law by nature,” that is, by virtue of not being born Jewish.

³ tn Grk “do by nature the things of the law.”