2 Peter 3:9 NIV
The Lord is not slow in keeping his promise, as some understand slowness.
Instead he is patient with you, not wanting anyone to perish,
but everyone to come to repentance.
That's one of my favorite passages and includes this:
In both of them (Peter's letters) I am stirring up your sincere mind by way of reminder, that you should remember the predictions of the holy prophets and the commandment of the Lord and Savior through your apostles, knowing this first of all, that scoffers will come in the last days with scoffing, following their own sinful desires. They will say, “Where is the promise of his coming? For ever since the fathers fell asleep, all things are continuing as they were from the beginning of creation.” 2 Peter 3:1-4