Exodus 8:2

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

Exodus 7:14

And Jehovah said unto Moses, Pharaoh's heart is stubborn, he refuseth to let the people go.

Exodus 9:2

For if thou refuse to let them go, and wilt hold them still,

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 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, as it were 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
And Jehovah said unto Moses, Pharaoh's heart is stubborn, he refuseth to let the people go.
Exodus 9:2
For if thou refuse to let them go, and wilt hold them still,

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 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, as it were frogs:

General references

Exodus 9:2
For if thou refuse to let them go, and wilt hold them still,

American Standard Version Public Domain