1 Thessalonians 4:8

So, the person who rejects [this exhortation] is not [merely] rejecting what man says but God [Himself], who gives His Holy Spirit to you.

Hebrews 10:28-29

The person who has disregarded the law of Moses is put to death without being shown mercy on the testimony of two or three witnesses.

Treasury of Scripture Knowledge

Summary

But the house of Israel rebelled against me in the wilderness: they walked not in my statutes, and they despised my judgments, which if a man do, he shall even live in them; and my sabbaths they greatly polluted: then I said, I would pour out my fury upon them in the wilderness, to consume them.

General references

Bible References

And they

1 Thessalonians 4:8
So, the person who rejects [this exhortation] is not [merely] rejecting what man says but God [Himself], who gives His Holy Spirit to you.
Hebrews 10:28
The person who has disregarded the law of Moses is put to death without being shown mercy on the testimony of two or three witnesses.

General references

Romans 7:10
and I died [i.e., came under its power]. And [so] the commandment, which was [intended] to bring [spiritual] life, actually brought [spiritual] death.