Romans 8:32

he that spared not his own son, but delivered him up for us all, will he not with him likewise freely give us all things?

Romans 11:21

lest God should not spare you, since he did not spare even the natural branches.

1 Corinthians 10:22

Shall we provoke the Lord to jealousy? are we stronger than he?

Hebrews 12:29

for "our God is a consuming fire."

2 Peter 2:4-5

for since God did not spare the angels, who had sinned, but having precipitated them to hell, confin'd them to chains of darkness, where they are reserv'd for judgment:

Revelation 3:5

he that overcometh, the same shall be cloathed in white raiment; I will not efface his name out of the book of life, but I will own him before my father, and before his angels.

Treasury of Scripture Knowledge

Summary

The LORD will not spare him, but then the anger of the LORD and his jealousy shall smoke against that man, and all the curses that are written in this book shall lie upon him, and the LORD shall blot out his name from under heaven.

His jealousy

Bible References

Will not spare

Romans 8:32
he that spared not his own son, but delivered him up for us all, will he not with him likewise freely give us all things?
Romans 11:21
lest God should not spare you, since he did not spare even the natural branches.
2 Peter 2:4
for since God did not spare the angels, who had sinned, but having precipitated them to hell, confin'd them to chains of darkness, where they are reserv'd for judgment:

His jealousy

1 Corinthians 10:22
Shall we provoke the Lord to jealousy? are we stronger than he?