Exodus 8:2
But if you refuse to let them go, behold, I will plague all your country with frogs.
Exodus 7:14
Then the LORD said to Moses, "Pharaoh's heart is hardened; he refuses to let the people go.
Exodus 9:2
For if you refuse to let them go and still 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.