Moses
Exodus 10:22ESV·traditional attribution

So Moses stretched out his hand toward heaven, and there was pitch darkness in all the land of Egypt three days.

John Calvin Reformed @genevareformer

22. And Moses stretched forth his hand. By this darkness God not only wished to reprove the blindness of Pharaoh’s mind, but in every way to convince him how senseless and mad he was in his resistance. There is no blessing which is more common to all men, from the very highest even to the lowest, than light, which is enjoyed not less by the...

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. The plague of darkness brought upon Egypt, and a most dreadful plague it was, and therefore is put first of the ten in Psa 105:28, though it was one of the last; and in the destruction of the spiritual Egypt it is produced by the fifth vial, which is poured out upon the seat of the beast, Rev 16:10. His kingdom was full of darkness.

Commenting on Exodus 10:21-29

John Gill Reformed Baptist @doctorgill

And Pharaoh called unto Moses,.... After the three days, as the Targum of Jonathan, when the darkness was over, or at least much diminished, fearing that still worse evils would befall him: and said, go ye, serve the Lord, only let your flocks and your herds be stayed; stopped or remained behind, as a pledge and security of their return; and these the rather he...