1 Corinthians 10:8

Nor may we be fornicators, like some of them who committed fornication and on a single day 23,000 of them fell dead.

Hebrews 2:2-3

For if the message delivered through angels proved to be true, and every transgression and act of disobedience met with 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 may we be fornicators, like some of them who committed fornication and on a single day 23,000 of them fell dead.
Hebrews 2:2
For if the message delivered through angels proved to be true, and every transgression and act of disobedience met with just retribution,