2 Peter 1:12-13

Wherefore, I will not neglect to put you always in remembrance of these things, although you know, and are established in the present truth.

2 Peter 1:15

Therefore, I will carefully endeavor that you may be able, after my decease, to have these things always in remembrance.

2 Peter 3:1

Beloved, this second epistle I now write to you, in which epistles I stir up your sincere mind to remembrance:

Treasury of Scripture Knowledge

Summary

Therefore we ought to give the more earnest heed to the things which we have heard, lest at any time we should let them slip.

Bible References

We should

2 Peter 1:12
Wherefore, I will not neglect to put you always in remembrance of these things, although you know, and are established in the present truth.
2 Peter 3:1
Beloved, this second epistle I now write to you, in which epistles I stir up your sincere mind to remembrance: