Jude 1:5

I want to remind you though you once knew this, that Jehovah (God), having saved a people out of the land of Egypt, afterward destroyed those who did not believe.

Psalm 106:26

Raising his hand, he swore that he would kill them in the wilderness,

Numbers 26:64-65

Not a single one of the Israelites Moses and the priest Aaron had counted in the Desert of Sinai were there.

2 Peter 3:1

This is the second letter I write to you, beloved. I stimulate your memory in each letter.

Numbers 14:22-37

none of the people who saw my glory and the miraculous signs I did in Egypt and in the desert will see the land I promised their ancestors. They have tested me now ten times and refused to obey me.

Deuteronomy 2:15-16

Jehovah kept getting rid of them until finally none of them were left.

Romans 15:15

Nevertheless, brothers, I have written more boldly to you on some points, keeping you in mind, because of the grace that is given to me from God,

1 Corinthians 10:1-12

Brothers, I do not want you to be ignorant about how all our fathers were under the cloud, and all passed through the sea.

Hebrews 3:16-2

Who were they who heard God and rebelled? All who came out of Egypt with Moses rebelled.

2 Peter 1:12-13

I will always be ready to remind you of these things. Even though you know them, and are established in the truth that is present with you.

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
Brothers, I do not want you to be ignorant about how all our fathers were under the cloud, and all passed through the sea.

Afterward

Numbers 14:22
none of the people who saw my glory and the miraculous signs I did in Egypt and in the desert will see the land I promised their ancestors. They have tested me now ten times and refused to obey me.
Numbers 26:64
Not a single one of the Israelites Moses and the priest Aaron had counted in the Desert of Sinai were there.
Deuteronomy 2:15
Jehovah kept getting rid of them until finally none of them were left.
Psalm 106:26
Raising his hand, he swore that he would kill them in the wilderness,
Hebrews 3:16
Who were they who heard God and rebelled? All who came out of Egypt with Moses rebelled.
Hebrews 4:1
While the promise of entering his rest remains, let us fear that one of you might come up short and not enter.

General references

Deuteronomy 1:32
Yet in all this you did not trust Jehovah your God.
Joshua 22:20
Remember how Achan son of Zerah would not obey the command about the things condemned to destruction. The whole assembly of Israel was punished for that. Achan was not the only one who died because of his sin.
Psalm 78:22
Because they did not believe in God and did not trust in his salvation.
Matthew 25:2
Five of them were foolish, and five were wise.
1 Corinthians 10:5
God was not pleased with most of them. And their bodies were scattered in the wilderness.
1 Timothy 5:15
Some have already turned aside after Satan.
Hebrews 3:19
We see that they could not enter in on account of a lack of faith (unbelief) (disobedience).