1 Corinthians 10:8

Nor let us commit fornication, as some of them did, and fell in one day three and twenty thousand.

Hebrews 2:2-3

For if the word spoken through angels proved steadfast, and every transgression and disobedience received a just retribution,

Treasury of Scripture Knowledge

Summary

And the children of Levi did according to the word of Moses: and there fell of the people that day about three thousand men.

Bible References

There fell

1 Corinthians 10:8
Nor let us commit fornication, as some of them did, and fell in one day three and twenty thousand.
Hebrews 2:2
For if the word spoken through angels proved steadfast, and every transgression and disobedience received a just retribution,