After the return of Sheshbazzar to Babylon this position was virtually filled by Zerubbabel, a grandson of Jehoiakin, the second last king of Judah, and appointed by the Persian king Peḥah or Satrap of Judah. Him Haggai now formally names the elect servant of Jehovah. In that overturning of the kingdoms of the world which Haggai had predicted two months before, and which he now explains as their mutual destruction by war, Jehovah of Hosts will make Zerubbabel His signet-ring, inseparable from Himself and the symbol of His authority.

_And the word of Jehovah came a second time to[716] Haggai on the twenty-fourth day of the_ ninth _month, saying: Speak to Zerubbabel, Satrap of Judah, saying: I am about to shake the heavens and the earth,[717] and I will overturn the thrones[718] of kingdoms, and will shatter the power of the kingdoms of the Gentiles, and will overturn chariots[719] and their riders, and horses and their riders will come down, every man by the sword of his brother. In that day—oracle of Jehovah of Hosts—I will take Zerubbabel, son of She’altî’el, My servant—oracle of Jehovah—and will make him like a signet-ring; for thee have I chosen—oracle of Jehovah of Hosts._

The Expositor's Bible; The Book of the Twelve Prophets, Vol. 2 (of 2) — Part 144

The wars and mutual destruction of the Gentiles, of which Haggai speaks, are doubtless those revolts of races and provinces, which threatened to disrupt the Persian Empire upon the accession of Darius in 521. Persians, Babylonians, Medes, Armenians, the Sacæ and others rose together or in succession. In four years Darius quelled them all, and reorganised his empire before the Jews finished their Temple. Like all the Syrian governors, Zerubbabel remained his poor lieutenant and submissive tributary. History rolled westward into Europe. Greek and Persian began their struggle for the control of its future, and the Jews fell into an obscurity and oblivion unbroken for centuries. The _signet-ring of Jehovah_ was not acknowledged by the world—does not seem even to have challenged its briefest attention. But Haggai had at least succeeded in asserting the Messianic hope of Israel, always baffled, never quenched, in this re-opening of her life. He had delivered the ancient heritage of Israel to the care of the new Judaism.

The Expositor's Bible; The Book of the Twelve Prophets, Vol. 2 (of 2) — Part 144