1 Corinthians 10:8

Neither let us commit whoredom, as some of them committed, and fell in one day three and twenty thousand.

Hebrews 2:2-3

For if the word spoken by angels was stedfast, and every transgression and disobedience received it's just recompence;

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
Neither let us commit whoredom, as some of them committed, and fell in one day three and twenty thousand.
Hebrews 2:2
For if the word spoken by angels was stedfast, and every transgression and disobedience received it's just recompence;