King James Version (KJV) - Exodus 10:21 >

¶ 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.

Berean Study Bible (BSB) - Exodus 10:21 >

Then the LORD said to Moses, “Stretch out your hand toward heaven, so that darkness may spread over the land of Egypt—a palpable darkness.”