But the LORD hardened Pharaoh’s heart, so that he would not let the children of Israel go.
A description of Pharaoh's continued refusal to release the Israelites.
Exodus 10:20
King James Version (public domain)
Traditionally attributed to Moses · c. 13th century BC · The Pentateuch — Genesis, Exodus, Leviticus, Numbers, and Deuteronomy — is traditionally attributed to him
Context
18And he went out from Pharaoh, and intreated the LORD.
19And the LORD 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.
20But the LORD hardened Pharaoh’s heart, so that he would not let the children of Israel go.
21And the LORD said unto Moses, Stretch out thine hand toward heaven, that there may be darkness over the land of Egypt, even darkness which may be felt.
22And Moses stretched forth his hand toward heaven; and there was a thick darkness in all the land of Egypt three days: