Moses
Exodus 9:24ESV·traditional attribution

There was hail and fire flashing continually in the midst of the hail, very heavy hail, such as had never been in all the land of Egypt since it became a nation.

Matthew Henry Presbyterian @wholebiblehenry

The threatened plague of hail is here summoned by the powerful hand and rod of Moses (Exo 9:22, Exo 9:23), and it obeys the summons, or rather the divine command; for fire and hail fulfil God's word, Psa 148:8. And here we are told, I. What desolations it made upon the earth.

Commenting on Exodus 9:22-35

John Gill Reformed Baptist @doctorgill

So there was hail, and fire mingled with the hail,.... Which was a miracle within a miracle, as Aben Ezra observes; and very wonderful indeed it was, that the hail did not quench the fire, nor the fire melt the hail, as Philo the Jew (i) remarks: very grievous, such as there was none like it in all the land of Egypt, since it became...

Jamieson-Fausset-Brown Reformed @jfbcommentary

PLAGUE OF HAIL. (Exo. 9:18-35) I will cause it to rain a very grievous hail, &c.--The seventh plague which Pharaoh's hardened heart provoked was that of hail, a phenomenon which must have produced the greatest astonishment and consternation in Egypt as rain and hailstones, accompanied by thunder and lightning, were very rare occurrences.

Commenting on Exodus 9:18-35