Exodus 8:31-32

Wycliffe Bible

³¹ the which did by the word of Moses (and he did what Moses asked), and took away the flies from Pharaoh, and from his servants, and from his people; none (was) left, soothly not one.

³² And the heart of Pharaoh was made hard, so that he delivered not the people, soothly neither in this time. (But again Pharaoh’s heart was hardened, and he would not let the people go, yea, truly not at that time.)