Moses
Exodus 8:31ESV·traditional attribution

And the LORD did as Moses asked, and removed the swarms of flies from Pharaoh, from his servants, and from his people; not one remained.

John Calvin Reformed @genevareformer

31. And the Lord did according to the word of Moses. “The word” here may be expounded either of the answer, or the prayer, of Moses. The former pleases me best, viz., that by the result God proved that He ratified what Moses had said, whom He had made the proclaimer of His judgment; but if any one prefer to refer it to his prayer, let him retain his opinion.

Matthew Henry Presbyterian @wholebiblehenry

Here is the story of the plague of flies, in which we are told, I. How it was threatened, like that of frogs, before it was inflicted. Moses is directed (Exo 8:20) to rise early in the morning, to meet Pharaoh when he came forth to the water, and there to repeat his demands. Note, 1.

Commenting on Exodus 8:20-32

Jamieson-Fausset-Brown Reformed @jfbcommentary

PLAGUE OF FLIES. (Exo 8:20-32) Rise up early . . . Pharaoh; lo, he cometh forth to the water, &c.--Pharaoh still appearing obdurate, Moses was ordered to meet him while walking on the banks of the Nile and repeat his request for the liberation of Israel, threatening in case of continued refusal to cover every house from the palace to the cottage with swarms of...

Commenting on Exodus 8:20-32