Romans 2:14-16

Young's Literal Translation

¹⁴ For, when nations that have not a law, by nature may do the things of the law, these not having a law -- to themselves are a law;

¹⁵ who do shew the work of the law written in their hearts, their conscience also witnessing with them, and between one another the thoughts accusing or else defending,

¹⁶ in the day when God shall judge the secrets of men, according to my good news, through Jesus Christ.