Isaiah 52:3-6

3-6. Shall be redeemed without money As the Babylonians paid no price for Israel, so they shall receive none for her return. God punishes injustice all round. His people, long time ago, went down to Egypt ostensibly to stay only till provision for their families should be obtainable in their own country. And because Egypt unjustly enslaved them, God overthrew the Egyptian king and his hosts. Equally, without cause, the Assyrian also became the oppressor of Israel.

Now… what have I here That is, in the matter of remuneration to the Assyrio-Babylonian. On his part he carried Israel away unjustly, and cruelly treated her. Yet now these oppressors howl and rail at Jehovah for reclaiming his own with no offer of pay. Israel, indeed, was at fault, but not against the Babylonians. She sold herself to captivity, but this injury was toward God, for he had the exclusive right to ownership in her. The honour of Jehovah himself demanded her restoration without price, for she was sold for nothing; he had in return for her just nothing, except infamy upon his holy name. Because the desolation of Jerusalem for so long a time has been an injury to him, to his honour, he will now (Isaiah 52:6) reveal his name.

My people shall know my name Whether he is thought of as El, or Elohim, or Jehovah, in each, or in all together, his name signifies the absolute, eternal, peaceful One, sole Creator and Ruler of all things.

In that day The day when his Jerusalem-Zion and her people shall be completely restored, historically and spiritually, these wicked oppressors and all the oppressed shall know, and my people emphatically shall know, that I am he that doth speak. That is, that He who promised redemption is now present as the true and omnipotent One to carry it into effect.