Exodus 8:2

But if you refuse to let them go, behold, I will smite your whole territory with frogs.

Exodus 7:14

Then the Lord said to Moses, “Pharaoh’s heart is stubborn; he refuses to let the people go.

Exodus 9:2

For if you refuse to let them go and continue to hold them,

Psalm 78:45

He sent among them swarms of flies which devoured them,
And frogs which destroyed them.

Psalm 105:30

Their land swarmed with frogs
Even in the chambers of their kings.

Revelation 16:13-14

And I saw coming out of the mouth of the dragon and out of the mouth of the beast and out of the mouth of the false prophet, three unclean spirits like frogs;

Treasury of Scripture Knowledge

Summary

And if thou refuse to let them go, behold, I will smite all thy borders with frogs:

General references

Bible References

Refuse

Exodus 7:14
Then the Lord said to Moses, “Pharaoh’s heart is stubborn; he refuses to let the people go.
Exodus 9:2
For if you refuse to let them go and continue to hold them,

Frogs

Psalm 78:45
He sent among them swarms of flies which devoured them,
And frogs which destroyed them.
Psalm 105:30
Their land swarmed with frogs
Even in the chambers of their kings.
Revelation 16:13
And I saw coming out of the mouth of the dragon and out of the mouth of the beast and out of the mouth of the false prophet, three unclean spirits like frogs;

General references

Exodus 9:2
For if you refuse to let them go and continue to hold them,