Romans 2:14-15 ESV

14 For when Gentiles, who do not have the law, 1by nature do what the law requires, they are a law to themselves, even though they do not have the law.

References for Romans 2:14

15 They show that the work of the law is 2written on their hearts, while their conscience also bears witness, and their conflicting thoughts accuse or even excuse them

References for Romans 2:15