For all who have sinned without the law will also perish without the law, and all who have sinned under the law will be judged by the law. For it is not the hearers of the law who are righteous before God, but the doers of the law who will be justified. Forwhen Gentiles, who do not have the law, by nature do what the law requires, they are a law to themselves, even though they do not have the law. They show that the work of the law is written on their hearts, while their conscience also bears witness, and their conflicting thoughts accuse or even excuse them. Romans 2:13-15 ESV
Romans 1:18-32 ESV
For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men, who by their unrighteousness suppress the truth.  For what can be known about God is plain to them, because God has shown it to them.  For his invisible attributes, namely, his eternal power and divine nature, have been clearly perceived, ever since the creation of the world, in the things that have been made. So they are without excuse.  For although they knew God, they did not honor him as God or give thanks to him, but they became futile in their thinking, and their foolish hearts were darkened.  Claiming to be wise, they became fools,  and exchanged the glory of the immortal God for images resembling mortal man and birds and animals and creeping things.  Therefore God gave them up in the lusts of their hearts to impurity, to the dishonoring of their bodies among themselves,  because they exchanged the truth about God for a lie and worshiped and served the creature rather than the Creator, who is blessed forever! Amen.  For this reason God gave them up to dishonorable passions. For their women exchanged natural relations for those that are contrary to nature;  and the men likewise gave up natural relations with women and were consumed with passion for one another, men committing shameless acts with men and receiving in themselves the due penalty for their error.  And since they did not see fit to acknowledge God, God gave them up to a debased mind to do what ought not to be done.  They were filled with all manner of unrighteousness, evil, covetousness, malice. They are full of envy, murder, strife, deceit, maliciousness. They are gossips,  slanderers, haters of God, insolent, haughty, boastful, inventors of evil, disobedient to parents,  foolish, faithless, heartless, ruthless.  Though they know God’s righteous decree that those who practice such things deserve to die, they not only do them but give approval to those who practice them.
Romans 2:1-8,11 ESV
Therefore you have no excuse, O man, every one of you who judges. For in passing judgment on another you condemn yourself, because you, the judge, practice the very same things.  We know that the judgment of God rightly falls on those who practice such things.  Do you suppose, O man-you who judge those who practice such things and yet do them yourself-that you will escape the judgment of God?  Or do you presume on the riches of his kindness and forbearance and patience, not knowing that God’s kindness is meant to lead you to repentance?  But because of your hard and impenitent heart you are storing up wrath for yourself on the day of wrath when God’s righteous judgment will be revealed.  He will render to each one according to his works:  to those who by patience in well-doing seek for glory and honor and immortality, he will give eternal life;  but for those who are self-seeking and do not obey the truth, but obey unrighteousness, there will be wrath and fury.  For God shows no partiality.