Romans 2:14-16

14For when the Gentiles, which have not the law, do by nature the things contained in the law, these, having not the law, are a law unto themselves:

15Which shew the work of the law written in their hearts, their conscience also bearing witness, and their thoughts the mean while accusing or else excusing one another;)

16In the day when God shall judge the secrets of men by Jesus Christ according to my gospel.