Exodus 8:2
And if you [are] refusing to release, look, I [am going to] plague all of your territory with frogs.
Exodus 7:14
And Yahweh said to Moses, "Pharaoh's heart [is] {insensitive}; he refuses to release the people.
Exodus 9:2
But if you [are] refusing to release and you still [are] keeping hold of them,
Psalm 78:45
He sent among them flies that devoured them and frogs that 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.