Exodus 9:17 in the King James Version
As yet exaltest thou thyself against my people, that thou wilt not let them go?
Context
16 but indeed for this cause I have made you stand: to show you my power, and that my name may be declared throughout all the earth,
17 because you still exalt yourself against my people, that you won’t let them go.
18 Behold, tomorrow about this time I will cause it to rain a very grievous hail, such as has not been in Egypt since the day it was founded even until now.