Moses
Exodus 9:19BSB·traditional attribution

So give orders now to shelter your livestock and everything you have in the field. Every man or beast that remains in the field and is not brought inside will die when the hail comes down upon them.’”

John Calvin Reformed @genevareformer

19. Sealed therefore now. He does not give this counsel as if he would spare His professed enemy, but he insults his mad confidence, because hitherto in his supine security he had despised whatever punishments had been denounced against him. He indirectly hints, therefore, that now is the time for fear.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. A general declaration of the wrath of God against Pharaoh for his obstinacy. Though God has hardened his heart (Exo 9:12), yet Moses must repeat his applications to him; God suspends his grace and yet demands obedience, to punish him for requiring bricks of the children of Israel when he denied them straw.

Commenting on Exodus 9:13-21

John Gill Reformed Baptist @doctorgill

Send therefore now, and gather thy cattle, and all that thou hast in the field,.... The servants that were at work there: this is said to denote both the certainty of the plague, and the terribleness of it, that all, both men and beast, would perish by it, if care was not taken to get them home; and also to show the wonderful clemency and...