Moses
Exodus 10:27ESV·traditional attribution

But the LORD hardened Pharaoh’s heart, and he would not let them go.

John Calvin Reformed @genevareformer

27. But the Lord hardened Pharaoh’s heart. A probable conjecture may be elicited front hence, that at the coming of Moses some light shone forth, so that the darkness was not so thick; because Pharaoh would never have dared to boast himself so proudly without being confident of impunity; but his pretences at the commencement (of their interview) are here omitted by Moses, though 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 Moses said, thou hast spoken well,.... Not that which was good, in a moral sense, for it was very wicked, but what would eventually prove true: I will see thy face again no more; which may be understood either conditionally, except he was sent for, and he desired to see him, he would not come of himself; or absolutely knowing by a spirit of...