2 Peter 1:9-10

1:9 But concerning the one who lacks such things – he is blind. That is to say, he is nearsighted, since he has forgotten about the cleansing of his past sins. 1:10 Therefore, brothers and sisters, make every effort to be sure of your calling and election. For by doing this you will never stumble into sin.

2 Peter 2:21

2:21 For it would have been better for them never to have known the way of righteousness than, having known it, to turn back from the holy commandment that had been delivered to them.

2 Peter 3:8-9

3:8 Now, dear friends, do not let this one thing escape your notice, that a single day is like a thousand years with the Lord and a thousand years are like a single day. 3:9 The Lord is not slow concerning his promise, as some regard slowness, but is being patient toward you, because he does not wish for any to perish but for all to come to repentance.

2 Peter 3:17

3:17 Therefore, dear friends, since you have been forewarned, be on your guard that you do not get led astray by the error of these unprincipled men and fall from your firm grasp on the truth.