And Moses said, Thus saith the Lord. I lately said that Moses did not go from Pharaoh's presence until he had delivered the message of his final destruction. This denunciation is, therefore, connected with the foregoing passage. Whence it appears how courageously Moses sustained the menaces of the tyrant, whilst he willingly encounters him, and boasts that he shall be his conqueror, though he be not in his presence, by the death of his first-born son in the coming night. Nor is it to be doubted that Pharaoh was confounded with terror, since, although so cruelly repulsed, he dismissed the Prophet in safety. Assuredly, since so unreserved a threatening must have inflicted a very bitter pang, so it would have aroused the cruelty of the raging tyrant, unless the same God who had endued His servant with admirable firmness, had also controlled the impetuosity of the savage beast. Why God, in inflicting punishment on the children, postponed till another time that of the fathers, whose sin was greater; why, in wreaking vengeance on the beasts, He spared men, it is not our province curiously to inquire, because it is sinful to prescribe to God, whose incomprehensible wisdom surmounts all human understanding, what should be the rule or measure of His judgments. By bringing the children and beasts to punishment, He certainly represented clearly to the wicked despisers of His power, what they had deserved. The first-born of Pharaoh, who would have been heir of the kingdom, is placed in the first rank of victims; afterwards the whole body of humbler people is mentioned, for the maid-servants, who turned their revolving mills, occupied a very low and despised condition, as appears not only from the ancient poets, but from the testimony of Scripture itself. (1 Samuel 8:16.) If any one chooses to observe the analogy between this plague and the unjust tyranny by which the Egyptians had afflicted Israel, God's first-born son, I make no objection. God again puts a difference between the Egyptians and his own people, when he declares that, in the midst of the great cry, the latter shall be quiet and tranquil. For this is the meaning of the figure, "A dog shall not move his tongue," because dogs are wont to bark at the very least noise in the night. Moreover, although such a separation between the faithful and unbelievers does not always appear, but rather do similar punishments generally involve them both together, yet in the final issue God divides them very widely one from the other. Wherefore we can never lose this felicity, that we know that all afflictions conspire unto the salvation of us, whom he has once embraced with His loving-kindness.

And Moses said - The following words must be read in immediate connection with the last verse of the preceding chapter.
About midnight - This marks the hour, but not the day, on which the visitation would take place. There may have been, and probably was, an interval of some days, during which preparations might be made both for the celebration of the Passover, and the departure of the Israelites.

About midnight will I go out - Whether God did this by the ministry of a good or of an evil angel is a matter of little importance, though some commentators have greatly magnified it. Both kinds of angels are under his power and jurisdiction, and he may employ them as he pleases. Such a work of destruction as the slaying of the first-born is supposed to be more proper for a bad than for a good angel. But the works of God's justice are not less holy and pure than the works of his mercy; and the highest archangel may, with the utmost propriety, be employed in either.

And Moses said,.... To Pharaoh before he left him, when he had told him he should see his face no more; for the three preceding verses are to be read in a parenthesis, being placed here by the historian, as giving some light to this last discourse and transaction between Moses and Pharaoh:
thus saith the Lord, about midnight will I go out into the midst of Egypt; perhaps to the capital and metropolis of it, which might stand in the midst of it, as usually does the royal city; or it may only signify that he would go into the very heart of it, and steer his course all around in every part and quarter of it, slaying the firstborn everywhere in all towns and cities throughout the kingdom, as follows; in order to which he is said to go out, either from the place where Moses used to go and pray to him, and where he met him and gave him his orders and instructions, or out of the land of Goshen, where he dwelt among the Israelites; or rather it only signifies the manifestation of himself in some work and action of his, the exertion of his power in inflicting punishment for sin: thus God is sometimes said to go forth out of his place when he is about to exercise judgment in the earth; for this must be understood consistent with his omnipresence, see Isaiah 26:21 and this was to be done about midnight, the middle of the night following the present day, which was the fourteenth of the month of Abib or Nisan; it was in the morning of that day Moses had this discourse with Pharaoh, and in the evening of it the passover was kept, and about the middle of the night the firstborn were slain, as follows.

The death of all the first-born in Egypt at once: this plague had been the first threatened, but is last executed. See how slow God is to wrath. The plague is foretold, the time is fixed; all their first-born should sleep the sleep of death, not silently, but so as to rouse the families at midnight. The prince was not too high to be reached by it, nor the slaves at the mill too low to be noticed. While angels slew the Egyptians, not so much as a dog should bark at any of the children of Israel. It is an earnest of the difference there shall be in the great day, between God's people and his enemies. Did men know what a difference God puts, and will put to eternity, between those that serve him and those that serve him not, religion would not seem to them an indifferent thing; nor would they act in it with so much carelessness as they do. When Moses had thus delivered his message, he went out from Pharaoh in great anger at his obstinacy; though he was the meekest of the men of the earth. The Scripture has foretold the unbelief of many who hear the gospel, that it might not be a surprise or stumbling-block to us, Romans 10:16. Let us never think the worse of the gospel of Christ for the slights men put upon it. Pharaoh was hardened, yet he was compelled to abate his stern and haughty demands, till the Israelites got full freedom. In like manner the people of God will find that every struggle against their spiritual adversary, made in the might of Jesus Christ, every attempt to overcome him by the blood of the Lamb, and every desire to attain increasing likeness and love to that Lamb, will be rewarded by increasing freedom from the enemy of souls.

Thus saith the Lord, About midnight--Here is recorded the announcement of the last plague made in the most solemn manner to the king, on whose hardened heart all his painful experience had hitherto produced no softening, at least no permanently good effect.
will I go out into the midst of Egypt--language used after the manner of men.

Moses' address to Pharaoh forms the continuation of his brief answer in Exodus 10:29. At midnight Jehovah would go out through the midst of Egypt. This midnight could not be "the one following the day on which Moses was summoned to Pharaoh after the darkness," as Baumgarten supposes; for it was not till after this conversation with the king that Moses received the divine directions as to the Passover, and they must have been communicated to the people at least four days before the feast of the Passover and their departure from Egypt (Exodus 12:3). What midnight is meant, cannot be determined. So much is certain, however, that the last decisive blow did not take place in the night following the cessation of the ninth plague; but the institution of the Passover, the directions of Moses to the people respecting the things which they were to ask for from the Egyptians, and the preparations for the feast of the Passover and the exodus, all came between. The "going out" of Jehovah from His heavenly seat denotes His direct interposition in, and judicial action upon, the world of men. The last blow upon Pharaoh was to be carried out by Jehovah Himself, whereas the other plagues had been brought by Moses and Aaron. מצרים בּתוך "in (through) the midst of Egypt:" the judgment of God would pass from the centre of the kingdom, the king's throne, over the whole land. "Every first-born shall die, from the first-born of Pharaoh, that sitteth upon his throne, even unto the first-born of the maid that is behind the mill," i.e., the meanest slave (cf. Exodus 12:29, where the captive in the dungeon is substituted for the maid, prisoners being often employed in this hard labour, Judges 16:21; Isaiah 47:2), "and all the first-born of cattle." This stroke was to fall upon both man and beast as a punishment for Pharaoh's conduct in detaining the Israelites and their cattle; but only upon the first-born, for God did not wish to destroy the Egyptians and their cattle altogether, but simply to show them that He had the power to do this. The first-born represented the whole race, of which it was the strength and bloom (Genesis 49:3). But against the whole of the people of Israel "not a dog shall point its tongue" (Exodus 11:7). The dog points its tongue to growl and bite. The thought expressed in this proverb, which occurs again in Joshua 10:21 and Judith 11:19, was that Israel would not suffer the slightest injury, either in the case of "man or beast." By this complete preservation, whilst Egypt was given up to death, Israel would discover that Jehovah had completed the separation between them and the Egyptians. The effect of this stroke upon the Egyptians would be "a great cry," having no parallel before or after (cf. Exodus 10:14); and the consequence of this cry would be, that the servants of Pharaoh would come to Moses and entreat them to go out with all the people. "At thy feet," i.e., in thy train (vid., Deuteronomy 11:6; Judges 8:5). With this announcement Moses departed from Pharaoh in great wrath. Moses' wrath was occasioned by the king's threat (Exodus 10:28), and pointed to the wrath of Jehovah, which Pharaoh would soon experience. As the more than human patience which Moses had displayed towards Pharaoh manifested to him the long-suffering and patience of his God, in whose name and by whose authority he acted, so the wrath of the departing servant of God was to show to the hardened king, that the time of grace was at an end, and the wrath of God was about to burst upon him.