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 a nation; Exodus 9:18.
i De Vita. Mosis, l. 1. p. 620.