Exodus 10:21

10:21 Yahweh said to Moses, "Stretch out your hand toward the sky, that there may be darkness over the land of Egypt, even darkness which may be felt."
-World English Bible

Other Translation

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.
-King James Version