Joshua 9:20

This we will do to them; we will let them live lest wrath come upon us because of the oath which we swore unto them.

2 Samuel 21:1-6

Then there was a famine in the days of David for three consecutive years, and David enquired of the LORD. And the LORD answered, It is because of Saul and because of his bloody house, because he slew the Gibeonites.

2 Chronicles 36:13

He rebelled, likewise, against King Nebuchadnezzar, unto whom he had sworn by God; but he stiffened his neck and hardened his heart from turning unto the LORD God of Israel.

Proverbs 20:25

It is a snare unto man to devour that which is holy and afterward to reconsider his vows.

Ezekiel 17:12-21

Say now to the rebellious house: Do ye not know what these things mean? Tell them, Behold, the king of Babylon is come to Jerusalem and has taken its king and its princes and led them with him to Babylon;

Zechariah 5:3-4

Then said he unto me, This is the curse that goes forth over the face of the whole earth; for every one that steals (as it is written on one side of the roll) shall be destroyed; and every one that swears (as it is written on the other side of the roll) shall be destroyed.

Malachi 3:5

And I will come near unto you for judgment; and I will be a swift witness against the sorcerers and against the adulterers and against false swearers and against those that oppress the hireling in his wages, the widow, and the fatherless, and that turn aside the stranger from his right, and do not fear me, said the LORD of the hosts.

Romans 1:31

without understanding, covenant breakers, without natural affection, implacable, without mercy.

1 Timothy 1:10

for fornicators, for homosexuals, for kidnappers, for liars, for perjured persons, and if there is any other thing that is contrary to sound doctrine,

Treasury of Scripture Knowledge

Summary

This we will do to them; we will even let them live, lest wrath be upon us, because of the oath which we sware unto them.

Bible References

Lest wrath

2 Samuel 21:1
Then there was a famine in the days of David for three consecutive years, and David enquired of the LORD. And the LORD answered, It is because of Saul and because of his bloody house, because he slew the Gibeonites.
2 Chronicles 36:13
He rebelled, likewise, against King Nebuchadnezzar, unto whom he had sworn by God; but he stiffened his neck and hardened his heart from turning unto the LORD God of Israel.
Proverbs 20:25
It is a snare unto man to devour that which is holy and afterward to reconsider his vows.
Ezekiel 17:12
Say now to the rebellious house: Do ye not know what these things mean? Tell them, Behold, the king of Babylon is come to Jerusalem and has taken its king and its princes and led them with him to Babylon;
Zechariah 5:3
Then said he unto me, This is the curse that goes forth over the face of the whole earth; for every one that steals (as it is written on one side of the roll) shall be destroyed; and every one that swears (as it is written on the other side of the roll) shall be destroyed.
Malachi 3:5
And I will come near unto you for judgment; and I will be a swift witness against the sorcerers and against the adulterers and against false swearers and against those that oppress the hireling in his wages, the widow, and the fatherless, and that turn aside the stranger from his right, and do not fear me, said the LORD of the hosts.
Romans 1:31
without understanding, covenant breakers, without natural affection, implacable, without mercy.
1 Timothy 1:10
for fornicators, for homosexuals, for kidnappers, for liars, for perjured persons, and if there is any other thing that is contrary to sound doctrine,