Exodus 8:2
If you refuse to let them go, behold, I will plague all your borders with frogs:
Exodus 7:14
Yahweh 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 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, even in the rooms of their kings.
Revelation 16:13-14
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, something like frogs;