Exodus 9:2

For if you refuse to let them go, and will hold them still,

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

And I say unto you, Let my son go, that he may serve me: and if you refuse to let him go, behold, I will slay your son, even your firstborn.

Else, if you refuse to let my people go, behold, tomorrow will I bring the locusts into your land:

But if you will not hearken unto me, and will not do all these commandments;

And if you will not be reformed by me by these things, but will walk contrary unto me;

And if you will not for all this hearken unto me, but walk contrary unto me;

God judges the righteous, and God is angry with the wicked every day.

But God shall wound the head of his enemies, and the hairy scalp of such a one as goes on still in his trespasses.

But if you refuse and rebel, you shall be devoured with the sword: for the mouth of the LORD has spoken it.

But unto them that are contentious, and do not obey the truth, but obey unrighteousness, indignation and wrath,

And I gave her time to repent of her fornication; and she repented not.

And men were scorched with great heat, and blasphemed the name of God, who has power over these plagues: and they repented not to give him glory.

Treasury of Scripture Knowledge

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