God here, as King of nations, brings a sore calamity upon Egypt and Ethiopia, but, as King of saints, brings good to his people out of it. Observe,

I.The date of this prophecy. It was in the year that Ashdod, a strong city of the Philistines (but which some think was lately recovered from them by Hezekiah, when he smote the Philistines even unto Gaza, Kg2 18:8), was besieged and taken by an army of the Assyrians. It is uncertain what year of Hezekiah that was, but the event was so remarkable that those who lived then could by that token fix the time to a year. He that was now king of Assyria is called Sargon, which some take to be the same with Sennacherib; others think he was his immediate predecessor, and succeeded Shalmaneser. Tartan, who was general, or commander-in-chief, in this expedition, was one of Sennacherib's officers, sent by him to bid defiance to Hezekiah, in concurrence with Rabshakeh, Kg2 18:17.

II.The making of Isaiah a sign, by his unusual dress when he walked abroad. He had been a sign to his own people of the melancholy times that had come and were coming upon them, by the sackcloth which for some time he had worn, of which he had a gown made, which he girt about him. Some think he put himself into that habit of a mourner upon occasion of the captivity of the ten tribes. Others think sackcloth was what he commonly wore as a prophet, to show himself mortified to the world, and that he might learn to endure hardness; soft clothing better becomes those that attend in king's palaces (Mat 11:8) than those that go on God's errands. Elijah wore hair-cloth (Kg2 1:8), and John Baptist (Mat 3:4) and those that pretended to be prophets supported their pretension by wearing rough garments (Zac 13:4); but Isaiah has orders given him to loose his sackcloth from his loins, not to exchange it for better clothing, but for none at all - no upper garment, no mantle, cloak, or coat, but only that which was next to him, we may suppose his shirt, waistcoat, and drawers; and he must put off his shoes, and go barefoot; so that compared with the dress of others, and what he himself usually wore, he might be said to go naked. This was a great hardship upon the prophet; it was a blemish to his reputation, and would expose him to contempt and ridicule; the boys in the streets would hoot at him, and those who sought occasion against him would say, The prophet is indeed a fool, and the spiritual man is mad, Hos 9:7. It might likewise be a prejudice to his health; he was in danger of catching a cold, which might throw him into a fever, and cost him his life; but God bade him do it, that he might give a proof of his obedience to God in a most difficult command, and so shame the disobedience of his people to the most easy and reasonable precepts. When we are in the way of our duty we may trust God both with our credit and with our safety. The hearts of that people were strangely stupid, and would not be affected with what they only heard, but must be taught by signs, and therefore Isaiah must do this for their edification. If the dress was scandalous, yet the design was glorious, and what a prophet of the Lord needed not to be ashamed of.

III.The exposition of this sign, Isa 20:3, Isa 20:4. It was intended to signify that the Egyptians and the Ethiopians should be led away captive by the king of Assyria, thus stripped, or in rags, and very shabby clothing, as Isaiah was. God calls him his servant Isaiah, because in this matter particularly he had approved himself God's willing, faithful, obedient servant; and for this very thing, which perhaps others laughed at him for, God gloried in him. To obey is better than sacrifice; it pleases God and praises him more, and shall be more praised by him. Isaiah is said to have walked naked and barefoot three years, whenever in that time he appeared as a prophet. But some refer the three years, not to the sign, but to the thing signified: He has walked naked and barefoot; there is a stop in the original; provided he did so once that was enough to give occasion to all about him to enquire what was the meaning of his doing so; or, as some think, he did it three days, a day for a year; and this for a three years' sign and wonder, for a sign of that which should be done three years afterwards or which should be three years in the doing. Three campaigns successively shall the Assyrian army make, in spoiling the Egyptians and Ethiopians, and carrying them away captive in this barbarous manner, not only the soldiers taken in the field of battle, but the inhabitants, young and old; and it being a very piteous sight, and such as must needs move compassion in those that had the least degree of tenderness left them to see those who had gone all their days well dressed now stripped, and scarcely having rags to cover their nakedness, that circumstance of their captivity is particularly taken notice of, and foretold, the more to affect those to whom this prophecy was delivered. It is particularly said to be to the shame of Egypt (v. 4), because the Egyptians were a proud people, and therefore when they did fall into disgrace it was the more shameful to them; and the higher they had lifted up themselves the lower was their fall, both in their own eyes and in the eyes of others.

IV.The use and application of this, Isa 20:5, Isa 20:6. 1. All that had any dependence upon, or correspondence with, Egypt and Ethiopia, should now be ashamed of them, and afraid of having any thing to do with them. Those countries that were in danger of being overrun by the Assyrians expected that Tirhakah, king of Ethiopia, with his numerous forces, would put a stop to the progress of their victorious arms, and be a barrier to his neighbours; and with yet more assurance they gloried that Egypt, a kingdom so famous for policy and prowess, would do their business, would oblige them to raise the siege of Ashdod and retire with precipitation. But, instead of this, by attempting to oppose the king of Assyria they did but expose themselves and make their country a prey to him. Hereupon all about them were ashamed that ever they promised themselves any advantage from two such weak and cowardly nations, and were more afraid now than ever they were of the growing greatness of the king of Assyria, before whom Egypt and Ethiopia proved but as briers and thorns put to stop a consuming fire, which do but make it burn the more strongly. Note, Those who make any creature their expectation and glory, and so put it in the place of God, will sooner or later be ashamed of it, and their disappointment in it will but increase their fear. See Eze 29:6, Eze 29:7. 2. The Jews in particular should be convinced of their folly in resting upon such broken reeds, and should despair of any relief from them (Isa 20:6): The inhabitants of this isle (the land of Judah, situated upon the sea, though not surrounded by it), of this country (so the margin); every one shall now have his eyes opened, and shall say, "Behold, such is our expectation, so vain, so foolish, and this is that which it will come to. We have fled for help to the Egyptians and Ethiopians, and have hoped by them to be delivered from the king of Assyria; but, now that they are broken thus, how shall we escape, that are not able to bring such armies into the field as they did?" Note, (1.) Those that confide in creatures will be disappointed, and will be made ashamed of their confidence; for vain is the help of man, and in vain is salvation hoped for from the hills or the height and multitude of the mountains. (2.) Disappointment in creature confidences, instead of driving us to despair, as here (how shall we escape?), should drive us to God; for, if we flee to him for help, our expectation shall not be frustrated.

At the same time spake the Lord by Isaiah the son of Amoz,.... Or, "by the hand of Isaiah", by his means; and it was to him likewise, as the following words show; and so the Septuagint version renders it; he spoke by him, by the sign he used, according to his order, and he spoke to him to use the sign:

saying; so the Arabic version, "with him"; and with these versions Noldius agrees:

go, and loose the sackcloth from off thy loins; a token of mourning, and which the prophet wore, as Kimchi thinks, because of the captivity of the ten tribes; and it may be also on account of the miseries that were coming upon the people of the Jews; though some think this was his common garb, and the same with the royal garment the prophets used to wear, Zac 13:4 but that he had put off, and had put on sackcloth in its room, which he is now bid to take off:

and put off thy shoe from thy foot; as a sign of distress and mourning also, Sa2 15:30,

and he did so, walking naked and barefoot; Kimchi thinks this was only visionally, or in the vision of prophecy, as he calls it, and not in reality; but the latter seems most probable, and best to agree with what follows; for he was obedient to the divine command, not regarding the disgrace which might attend it, nor the danger of catching cold, to which he was exposed; and hence he has the character of a servant of the Lord, in the next words, and a faithful obedient one he was.

by--literally, "by the hand of" (compare Eze 3:14).

sackcloth--the loose outer garment of coarse dark hair-cloth worn by mourners (Sa2 3:31) and by prophets, fastened at the waist by a girdle (Mat 3:4; Kg2 1:8; Zac 13:4).

naked--rather, "uncovered"; he merely put off the outer sackcloth, retaining still the tunic or inner vest (Sa1 19:24; Amo 2:16; Joh 21:7); an emblem to show that Egypt should be stripped of its possessions; the very dress of Isaiah was a silent exhortation to repentance.