Punishment.

When God delays discipline, it’s not due to indifference;
it’s due to His very nature—He is gracious and slow to anger.
Some see that as permission to sin, but God intends it to be an invitation to repent.

As it is said about God's righteous judgement in Romans 2:1-4,
"You, therefore, have no excuse, you who pass judgment on someone else, for at whatever point you judge the other, you are condemning yourself, because you who pass judgment do the same things. 2Now we know that God's judgment against those who do such things is based on truth. 3So when you, a mere man, pass judgment on them and yet do the same things, do you think you will escape God's judgment? 4Or do you show contempt for the riches of his kindness, tolerance and patience, not realizing that God's kindness leads you toward repentance?"