Moses
Exodus 10:1BSB·traditional attribution

Then the LORD said to Moses, “Go to Pharaoh, for I have hardened his heart and the hearts of his officials, that I may perform these miraculous signs of Mine among them,

John Calvin Reformed @genevareformer

1. And the Lord said. Moses passes on to another plague, whereby God took vengeance on the treachery and obstinacy of the wicked king; viz., that He gave over the remaining produce of the year, which He had spared, to be eaten and devoured by locusts. And this was no ordinary punishment, to destroy Egypt by dearth and famine, when all their corn had perished.

Matthew Henry Presbyterian @wholebiblehenry

Here, I. Moses is instructed. We may well suppose that he, for his part, was much astonished both at Pharaoh's obstinacy and at God's severity, and could not but be compassionately concerned for the desolations of Egypt, and at a loss to conceive what this contest would come to at last.

Commenting on Exodus 10:1-11

John Gill Reformed Baptist @doctorgill

And the Lord said unto Moses, go in unto Pharaoh, for I have hardened his heart,.... Or, as some render it, "though I have hardened his heart" (u); or otherwise it would seem rather to be a reason he should not go, than why he should; at least it would be discouraging, and he might object to what purpose should he go, it would be...