Isaiah 52:4

Thus saith the Lord God - אדני יהוה Adonai Jehovah; but Adonai is wanting in twelve of Kennicott’s, five of De Rossi’s, and two of my own MSS.; and by the Septuagint and Arabic. Some MSS. have יהוה צבאות Jehovah tsebaoth, “Lord of hosts;” and others have יהוה אלהים Yehovah Elohim, “Lord God.”

Remember how I delivered you from Egypt and the Assyrian; what, then, is to prevent Me from delivering you out of Babylon (and the mystical Babylon and the Antichrist in the last days)? without cause--answering to "for naught" in Isa 52:5; it was an act of gratuitous oppression in the present case, as in that case.

For thus saith the Lord God - In order to show them that he could redeem them without money, God reminds them of what had been done in former times. The numerous captives in Egypt, whose services were so valuable to the Egyptians, and whom the Egyptians were so unwilling to suffer to depart, he had rescued by his own power, and had delivered for ever from that bondage. The idea here is, that with the same ease he could rescue the captives in Babylon, and restore them to their own land without a price. My people went down - That is, Jacob and his sons. The phrase ‘went down,’ is applied to a journey to Egypt, because Judea was a mountainous and elevated country compared with Egypt, and a journey there was in fact a descent to a more level and lower country. To sojourn there - Not to dwell there permanently, but to remain there only for a time. They went in fact only to remain until the severity of the famine should have passed by, and until they could return with safety to the land of Canaan. And the Assyrians oppressed them without cause - A considerable variety has existed in the interpretation of this passage. The Septuagint renders it, ‘And to the Assyrians they were carried by force.’ Some have supposed that this refers to the oppressions that they experienced in Egypt, and that the name ‘Assyrian’ is here given to Pharaoh. So Forerius and Cajetan understand it. They suppose that the name, ‘the Assyrian,’ became, in the apprehension of the Jews, the common name of that which was proud, oppressive, and haughty, and might therefore be used to designate Pharaoh. But there are insuperable objections to this. For the name ‘the Assyrian’ is not elsewhere given to Pharaoh in the Scriptures, nor can it be supposed to be given to him but with great impropriety. […]