Exodus 10:20
But the Yahuah hardened Pharaoh's heart, so that he would not let the children of Israel go.
ā The Restored Word Bible
Context
18 And he went out from Pharaoh, and intreated the Yahuah.
19 And the Yahuah turned a mighty strong west wind, which took away the locusts, and cast them into the Red sea; there remained not one locust in all the coasts of Egypt.
20 But the Yahuah hardened Pharaoh's heart, so that he would not let the children of Israel go.
21 And the Yahuah said unto Moses, Stretch out your hand toward heaven, that there may be darkness over the land of Egypt, even darkness may be felt.
22 And Moses stretched forth his hand toward heaven; and there was a thick darkness in all the land of Egypt three days: