All my plagues - This applies to all the plagues which follow; the effect of each was foreseen and foretold. The words "at this time" point to a rapid and continuous succession of blows. The plagues which precede appear to have been spread over a considerable time; the first message of Moses was delivered after the early harvest of the year before, when the Israelites could gather stubble, i. e. in May and April: the second mission, when the plagues began, was probably toward the end of June, and they went on at intervals until the winter; this plague was in February; see Exodus 9:31.

For I will at this time send all my plagues upon thine heart,.... Not meaning particularly the plague of the hail, which next follows, so called, because it consisted of various things, as hail, rain, lightning, and thunder, as Aben Ezra, and who observes, that Pharaoh was more terrified with this plague than with any other; but rather all the plagues yet to come, for by them are not meant all the plagues that were in the power of God to inflict, which how many and great they are none can say, but all that he had determined in his mind to bring upon him; and these should not so much affect and afflict his body, as the boils and ulcers had the magicians, but should reach his heart, and fill him with horror and terror:

and upon thy servants, and upon thy people; even all that he intended to bring not only upon himself, but upon his subjects, both high and low:

that thou mayest know, that there is none like unto me in all the earth; for the perfections of his nature, and the works of his hands, particularly his providential dealings with the sons of men, and especially with him.

For I will at this time send all my plagues upon {c} thine heart, and upon thy servants, and upon thy people; that thou mayest know that there is none like me in all the earth.

(c) So that your own conscience will condemn you of ingratitude and malice.

9:14 I will find all my plagues upon thy heart - Hitherto thou hast not felt my plagues on thy own person, the heart is put for the whole man.

9:13-21 Moses is here ordered to deliver a dreadful message to Pharaoh. Providence ordered it, that Moses should have a man of such a fierce and stubborn spirit as this Pharaoh to deal with; and every thing made it a most signal instance of the power of God has to humble and bring down the proudest of his enemies. When God's justice threatens ruin, his mercy at the same time shows a way of escape from it. God not only distinguished between Egyptians and Israelites, but between some Egyptians and others. If Pharaoh will not yield, and so prevent the judgment itself, yet those that will take warning, may take shelter. Some believed the things which were spoken, and they feared, and housed their servants and cattle, and it was their wisdom. Even among the servants of Pharaoh, some trembled at God's word; and shall not the sons of Israel dread it? But others believed not, and left their cattle in the field. Obstinate unbelief is deaf to the fairest warnings, and the wisest counsels, which leaves the blood of those that perish upon their own heads.