Jude 1:5

Now I want to remind you, though you know it all already, that he who brought the people safely out of the land of Egypt afterward destroyed the ones who did not believe,

2 Peter 3:1

This is the second letter, dear friends, that I have now written to you, in the effort to arouse your unsullied minds

Romans 15:15

But, just to refresh your memories, I have written you pretty boldly on some points, because of the favor God has shown me

1 Corinthians 10:1-12

For I would not have you forget, brothers, that though our forefathers were all protected by the cloud, and all passed safely through the sea,

Hebrews 3:16-2

For who was it that heard him speak and yet provoked him? Was it not all those who had escaped from Egypt under Moses' leadership?

2 Peter 1:12-13

Therefore I will always remind you of this, although you know it and are firmly grounded in the truth that you have.

Treasury of Scripture Knowledge

Summary

I will therefore put you in remembrance, though ye once knew this, how that the Lord, having saved the people out of the land of Egypt, afterward destroyed them that believed not.

Bible References

Having

1 Corinthians 10:1
For I would not have you forget, brothers, that though our forefathers were all protected by the cloud, and all passed safely through the sea,

Afterward

Hebrews 3:16
For who was it that heard him speak and yet provoked him? Was it not all those who had escaped from Egypt under Moses' leadership?
Hebrews 4:1
We ought therefore to fear that when the promise of admission to his Rest is still open, some one of you may be found to have failed to reach it.

General references

Matthew 25:2
Now five of them were foolish and five were sensible.
1 Timothy 5:15
For some widows have already turned aside to follow Satan.
Hebrews 3:19
So we see that it was their unbelief that kept them from being admitted to it.