Hebrews 2:1-3

For this reason we must pay the more earnest heed to the things which we have heard, for fear we should drift away.

Hebrews 10:28-29

Any one who set at naught the law of Moses was put to death without pity, on the testimony of two or three witnesses.

Hebrews 12:25

See that you do not refuse him who is speaking. For if they did not escape punishment when they refused to listen to their instructor on earth, much less shall we escape if we turn away from him who is teaching us from heaven;

Treasury of Scripture Knowledge

Summary

Now they that died in the plague were fourteen thousand and seven hundred, beside them that died about the matter of Korah.

Bible References

Fourteen thousand

Hebrews 2:1
For this reason we must pay the more earnest heed to the things which we have heard, for fear we should drift away.
Hebrews 10:28
Any one who set at naught the law of Moses was put to death without pity, on the testimony of two or three witnesses.
Hebrews 12:25
See that you do not refuse him who is speaking. For if they did not escape punishment when they refused to listen to their instructor on earth, much less shall we escape if we turn away from him who is teaching us from heaven;