Exodus 8:15

But when Pharaoh
<06547>

saw
<07200> (8799)

that there was respite
<07309>_,

he hardened
<03513> (8687)

his heart
<03820>_,

and hearkened
<08085> (8804)

not unto them; as the LORD
<03068>

had said
<01696> (8765)_.

Exodus 8:31-32

And the LORD
<03068>

did
<06213> (8799)

according to the word
<01697>

of Moses
<04872>_;

and he removed
<05493> (8686)

the swarms
<06157>

[of flies] from Pharaoh
<06547>_,

from his servants
<05650>_,

and from his people
<05971>_;

there remained
<07604> (8738)

not one
<0259>_.

And Pharaoh
<06547>

hardened
<03513> (8686)

his heart
<03820>

at this time
<06471>

also, neither would he let the people
<05971>

go
<07971> (8765)_.