Exodus 9

10. Moses took ashes from the furnace--Hebrew, "brick-kiln." The magicians, being sufferers in their own persons, could do nothing, though they had been called; and as the brick-kiln was one of the principal instruments of oppression to the Israelites [ Deuteronomy 4:20 , 1 Kings 8:51 , Jeremiah 11:4 ], it was now converted into a means of chastisement to the Egyptians, who were made to read their sin in their punishment.

Exodus 9:18-35 . PLAGUE OF HAIL.

18. 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.
such as hath not been in Egypt--In the Delta, or lower Egypt, where the scene is laid, rain occasionally falls between January and March--hail is not unknown, and thunder sometimes heard. But a storm, not only exhibiting all these elements, but so terrific that hailstones of immense size fell, thunder pealed in awful volleys, and lightning swept the ground like fire, was an unexampled calamity.

20, 21. He that feared the word of the Lord . . . regarded not, &c.--Due premonition, it appears, had been publicly given of the impending tempest--the cattle seem to have been sent out to graze, which is from January to April, when alone pasturage can be obtained, and accordingly the cattle were in the fields. This storm occurring at that season, not only struck universal terror into the minds of the people, but occasioned the destruction of all--people and cattle--which, in neglect of the warning, had been left in the fields, as well as of all vegetation [ Exodus 9:25 ]. It was the more appalling because hailstones in Egypt are small and of little force; lightning also is scarcely ever known to produce fatal effects; and to enhance the wonder, not a trace of any storm was found in Goshen [ Exodus 9:26 ].

27-35. Pharaoh sent, and called for Moses and Aaron, and said unto them, I have sinned--This awful display of divine displeasure did seriously impress the mind of Pharaoh, and, under the weight of his convictions, he humbles himself to confess he has done wrong in opposing the divine will. At the same time he calls for Moses to intercede for cessation of the calamity. Moses accedes to his earnest wishes, and this most awful visitation ended. But his repentance proved a transient feeling, and his obduracy soon became as great as before.

31, 32. the flax and the barley was smitten, &c.--The peculiarities that are mentioned in these cereal products arise from the climate and physical constitution of Egypt. In that country flax and barley are almost ripe when wheat and rye (spelt) are green. And hence the flax must have been "bolled"--that is, risen in stalk or podded in February, thus fixing the particular month when the event took place. Barley ripens about a month earlier than wheat. Flax and barley are generally ripe in March, wheat and rye (properly, spelt) in April.