Romans 2:14-15 (King James Version)

 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;)