2 Peter 1:10; 2 Peter 1:15; 2 Peter 3:14

2 Peter 1:10

10 Therefore, brethren, be all the more diligent to make certain about His calling and choosing you; for as long as you practice these things, you will never stumble;

2 Peter 1:15

15 And I will also be diligent that at any time after my departure you will be able to call these things to mind.

2 Peter 3:14

14 Therefore, beloved, since you look for these things, be diligent to be found by Him in peace, spotless and blameless,