Deuteronomy 11:28

and the curse, if you do not listen to the commandments of the Lord your God, but turn aside from the way which I am commanding you today, by following other gods which you have not known.

Deuteronomy 28:15-68

But it shall come about, if you do not obey the Lord your God, to observe to do all His commandments and His statutes with which I charge you today, that all these curses will come upon you and overtake you:

Leviticus 26:14-32

But if you do not obey Me and do not carry out all these commandments,

Deuteronomy 29:19-28

It shall be when he hears the words of this curse, that he will boast, saying, ‘I have peace though I walk in the stubbornness of my heart in order to destroy the watered land with the dry.’

Isaiah 1:20

“But if you refuse and rebel,
You will be devoured by the sword.”
Truly, the mouth of the Lord has spoken.

Isaiah 3:11

Woe to the wicked! It will go badly with him,
For what he deserves will be done to him.

Matthew 25:41

“Then He will also say to those on His left, ‘Depart from Me, accursed ones, into the eternal fire which has been prepared for the devil and his angels;

Romans 2:8-9

but to those who are selfishly ambitious and do not obey the truth, but obey unrighteousness, wrath and indignation.

Galatians 3:10

For as many as are of the works of the Law are under a curse; for it is written, “Cursed is everyone who does not abide by all things written in the book of the law, to perform them.”

Treasury of Scripture Knowledge

Summary

And a curse, if ye will not obey the commandments of the LORD your God, but turn aside out of the way which I command you this day, to go after other gods, which ye have not known.

Bible References

General references

Deuteronomy 28:15
But it shall come about, if you do not obey the Lord your God, to observe to do all His commandments and His statutes with which I charge you today, that all these curses will come upon you and overtake you:
Deuteronomy 29:19
It shall be when he hears the words of this curse, that he will boast, saying, ‘I have peace though I walk in the stubbornness of my heart in order to destroy the watered land with the dry.’
Leviticus 26:14
But if you do not obey Me and do not carry out all these commandments,
Isaiah 1:20
“But if you refuse and rebel,
You will be devoured by the sword.”
Truly, the mouth of the Lord has spoken.
Isaiah 3:11
Woe to the wicked! It will go badly with him,
For what he deserves will be done to him.
Matthew 25:41
“Then He will also say to those on His left, ‘Depart from Me, accursed ones, into the eternal fire which has been prepared for the devil and his angels;
Romans 2:8
but to those who are selfishly ambitious and do not obey the truth, but obey unrighteousness, wrath and indignation.
Galatians 3:10
For as many as are of the works of the Law are under a curse; for it is written, “Cursed is everyone who does not abide by all things written in the book of the law, to perform them.”