Matthew 12 comes to mind.
34“You brood of vipers, how can you, being evil, speak what is good? For the mouth speaks out of that which fills the heart. 35“The good man brings out of his good treasure what is good; and the evil man brings out of his evil treasure what is evil. 36“But I tell you that every careless word that people speak, they shall give an accounting for it in the day of judgment.
Even though they do not believe in good and evil, they will nevertheless be judged according to their evil.
Well stated. Thanks.