But if you are not willing to release them, behold, I will strike all your coasts with frogs
Other versions
King James Version
And if thou refuse to let them go, behold, I will smite all thy borders with frogs:English Standard Version
But if you refuse to let them go, behold, I will plague all your country with frogs.New International Version
If you refuse to let them go, I will plague your whole country with frogs.