Exodus 10:21

Then the LORD said to Moses, 'Stretch out your hand toward the sky so that darkness will spread over Egypt--darkness that can be felt.'

(New International Version)

Then the LORD said to Moses, 'Stretch out your hand toward the sky, that there may be darkness over the land of Egypt, even a darkness which may be felt.'

(New American Standard Bible)

And 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.

(King James Version)