Exodus 10:22 WBT

²⁰  But the LORD hardened Pharaoh's heart, so that he would not let the children of Israel go.

²¹  And the LORD said to Moses, Stretch out thy hand towards heaven, that there may be darkness over the land of Egypt, even darkness [which] may be felt.

²²  And Moses stretched forth his hand towards heaven: and there was a thick darkness in all the land of Egypt three days:

²³  They saw not one another, neither rose any from his place for three days: but all the children of Israel had light in their dwellings.

²⁴  And Pharaoh called to Moses, and said, Go ye, serve the LORD; only let your flocks and your herds be stayed: let your little ones also go with you.