And it shall be for a sign - The altar, and the pillar. This shows that the altar was not to be for sacrifice, but was a "memorial," or designed to designate a place of worship.

They shall cry to the Lord because of the oppressors - That is, oppressed and borne down under the exactions of their rulers, they shall seek deliverance from the true God - one instance among many of the effect of affliction and oppression in leading people to embrace the true religion.

And he shall send them a saviour - Who this "saviour" would be, has been a subject on which there has been a great difference of opinion. Grotius supposes that it would be "the angel" by which the army of Sennacherib would be destroyed. Gesenius thinks it was Psammetichus, who would deliver them from the tyranny of the eleven kings who were contending with each other, or that, since in Isaiah 19:4, he is called a 'severe lord,' it is probable that the promise here is to be understood of a delivering or protecting angel. But it is evident that some person is here denoted who would be sent "subsequently" to the national judgments which are here designated. Dr. Gill supposes that by the saviour here is meant the Messiah; but this interpretation does not suit the connection, for it is evident that the event here predicted, was to take place before the coming of Christ. Vitringa and Dr. Newton suppose with more probability that Alexander the Great is here referred to, who took possession of Egypt after his conquest in the East, and who might be called "a saviour," inasmuch as he delivered them from the reign of the oppressive kings who had tyrannized there, and inasmuch as his reign and the reigns of those who succeeded him in Egypt, would be much more mild than that of the former kings of that country.

That Alexander the Great was regarded by the Egyptians as a saviour or deliverer, is apparent from history. Upon his coming to Egypt, the people submitted to him cheerfully, out of hatred to the Persians, so that he became master of the country without any opposition (Diod. Sic. xvii. 49; Arrian, iii. 3, 1; Q. Curtius, iv. 7, 8, as quoted by Newton). He treated them with much kindness; built the city of Alexandria, calling it after his own name, designing to make it the capital of his empire; and under him and the Ptolemies who succeeded him, trade revived, commerce flourished, learning was patronized, and peace and plenty blessed the land. Among other things, Alexander transplanted many Jews into Alexandria, and granted them many privileges, equal to the Macedonians themselves (Jos. "Bell. Jud." ii. 18. 7; "Contra Ap." ii. 4). 'The arrival of Alexander,' says Wilkinson ("Ancient Egyptians," vol. i. pp. 213, 214), 'was greeted with universal satisfaction.

Their hatred of the Persians, and their frequent alliances with the Greeks, who had fought under the same banners against a common enemy, naturally taught the Egyptians to welcome the Macedonian army with the strongest demonstrations of friendship, and to consider their coming as a direct interposition of the gods; and so wise and considerate was the conduct of the early Ptolemies, that they almost ceased to regret the period when they were governed by their native princes.' Under the Ptolemies, large numbers of the Jews settled in Egypt. For their use, as has been remarked, the Old Testament was translated into Greek, and a temple was built by Onias, under the sixth Ptolemy. Philo represents the number of the Jews in Egypt in his time at not less than one million. They were settled in nearly all parts oF Egypt; but particularly in Heliopolis or the city of the sun, in Migdol, in Tahpanes, in Noph or Memphis, in Pathros or Thebais Jeremiah 44:1 - perhaps the five cities referred to in Isaiah 19:18.

And a great one - (ורב vârâb). A mighty one; a powerful saviour. The name 'great' has been commonly assigned to Alexander. The Septuagint renders this, 'Judging (κρίνων krinōn), he shall save them;' evidently regarding רב râb as derived from ריב riyb "to manage a cause, or to judge." Lowth renders it, 'A vindicator.' The word means "great, mighty;" and is repeatedly applied to a prince, chief, or captain 2 Kings 25:8; Esther 1:8; Daniel 1:3; Daniel 2:48; Daniel 5:11.

And it shall be for a sign and for a witness unto the Lord of hosts in the land of Egypt,.... This refers either to what goes before, that the altar and pillar were signs and witnesses that the Lord was believed in, professed, and worshipped there; or to what follows after, that the Lord's hearing the cries of men, and answering them, by sending a great Saviour to them, is a token and testimony for him of his great love unto them:

for they shall cry unto the Lord because of the oppressors; as men awakened and convinced do, feeling the oppressions of a guilty conscience, and a tempting devil, and an ensnaring wicked world:

and he shall send them a Saviour, and a great one, and he shall deliver them; this is Christ, whom God sent in the fulness of time to be the Saviour of lost sinners; and he is a "great" one indeed, the great God, and our Saviour, Titus 2:13 who is the Son of God, the true God, and eternal life, who has all the perfections of deity in him; the Creator and Upholder of all things; and must have therefore great and sufficient abilities to save sinners to the uttermost; and those that come to God by him he does save and deliver from all their sins, and out of the hands of all their enemies, and from wrath, ruin, and destruction. Abarbinel (e) owns that the Messiah is here meant, as undoubtedly he is; and not the angel that destroyed Sennacherib's army, as Kimchi; for the text speaks not of the Jews, but of the Egyptians. Vitringa thinks that either Alexander, called the Great, or else Ptolemy the son of Lagus, who had the same epithet, and who was also called "Soter", the saviour, is here meant.

(e) Mashmiah Jeshua, fol. 13. 1.

And it shall be for a sign and for a witness to the LORD of hosts in the land of Egypt: for they shall cry to the LORD because of the oppressors, and he shall send them {u} a saviour, and a great one, and he shall deliver them.

(u) This declares that this prophecy would be accomplished in the time of Christ.

19:20 It - The altar or pillar last mentioned. A witness - To testify that they own the Lord for their God. Cry - Being sorely distressed, they shall turn unto the true God. A great one - A great or mighty Saviour, even Christ.

20. it-the altar and pillar.

a sign-(of the fulfilment of prophecy) to their contemporaries.

a witness-to their descendants.

unto the Lord-no longer, to their idols, but to Jehovah.

for they shall cry-or, "a sign . that they cried, . and He sent to them a saviour"; probably, Alexander the Great (so "a great one"), whom the Egyptians welcomed as a deliverer (Greek, Soter, a title of the Ptolemies) out of the hands of the Persians, who under Cambyses had been their "oppressors." At Alexandria, called from him, the Old Testament was translated into Greek for the Greek-speaking Jews, who in large numbers dwelt in Egypt under the Ptolemies, his successors. Messiah is the antitype ultimately intended (compare Ac 2:10, "Egypt").

19:18-25 The words, In that day, do not always refer to the passage just before. At a time which was to come, the Egyptians shall speak the holy language, the Scripture language; not only understand it, but use it. Converting grace, by changing the heart, changes the language; for out of the abundance of the heart the mouth speaks. So many Jews shall come to Egypt, that they shall soon fill five cities. Where the sun was worshipped, a place infamous for idolatry, even there shall be a wonderful reformation. Christ, the great Altar, who sanctifies every gift, shall be owned, and the gospel sacrifices of prayer and praise shall be offered up. Let the broken-hearted and afflicted, whom the Lord has wounded, and thus taught to return to, and call upon him, take courage; for He will heal their souls, and turn their sorrowing supplications into joyful praises. The Gentile nations shall not only unite with each other in the gospel fold under Christ, the great Shepherd, but they shall all be united with the Jews. They shall be owned together by him; they shall all share in one and the same blessing. Meeting at the same throne of grace, and serving with each other in the same business of religion, should end all disputes, and unite the hearts of believers to each other in holy love.