What Does Exodus 10:22 Mean?

So Moses stretched out his hand toward heaven, and there was pitch darkness in all the land of Egypt three days. The execution of the darkness plague follows the instruction exactly, as always: Moses stretched, darkness came. The "pitch darkness" (Hebrew: choshech afelah, dense/thick darkness) is the most intense darkness vocabulary in Hebrew: the same word used in Deuteronomy 4:11 for the darkness of Sinai's divine presence and in Joel 2:2 for the Day of the LORD's darkness. The "pitch darkness" is not dim lighting or overcast skies; it is the complete removal of light that leaves only the palpable, heavy darkness of verse 21.

The "three days" duration of the darkness plague is unique: no previous plague is given a specific duration of days. The blood plague lasted seven days (Exodus 7:25); all other plagues have indefinite duration until Moses' prayer ends them. The three-day specification for the darkness has a specific function in the Exodus narrative: three days is the duration Israel requested for their worship journey (Exodus 3:18; 8:27).

Pharaoh has repeatedly refused a three-day worship journey; YHWH responds with a three-day darkness of Egypt. The same three days that Israel needed for worship, Egypt endures without light. The numerical echo is the divine commentary on Pharaoh's repeated "no" to the three-day worship request.

The darkness over Egypt while Israel has light (verse 23) is the most dramatic Goshen exemption in the plague sequence: not just "Goshen protected from the plague" but "Israel has light while Egypt has pitch darkness." The contrast is absolute: two adjacent populations, one in normal daylight and one in supernatural darkness, for three full days. The physical difference visible to any who could cross the border is the most immediate demonstration of the Goshen distinction: walk from Egyptian territory into Israelite territory and find light.