Exodus 7:16-17

And thou shalt say
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unto him, The LORD
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God
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of the Hebrews
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hath sent
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me unto thee, saying
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Let my people
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go
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that they may serve
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me in the wilderness
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and, behold, hitherto
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thou wouldest not hear
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Thus saith
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the LORD
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In this thou shalt know
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that I [am] the LORD
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behold, I will smite
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with the rod
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that [is] in mine hand
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upon the waters
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which [are] in the river
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and they shall be turned
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to blood
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