Powerful kings have been over Jerusalem who ruled throughout the entire Trans-Euphrates and who were the beneficiaries of tribute, custom, and toll.
TSK
TSK · Ezra 6:8
Treasury of Scripture Knowledge references in NET.
But God was watching over the elders of Judah, and they were not stopped until a report could be dispatched to Darius and a letter could be sent back concerning this.
The elders of the Jews continued building and prospering, while at the same time Haggai the prophet and Zechariah the son of Iddo continued prophesying. They built and brought it to completion by the command of the God of Israel and by the command of Cyrus and Darius and Artaxerxes king of Persia.
and a letter for Asaph the keeper of the king’s nature preserve, so that he will give me timber for beams for the gates of the fortress adjacent to the temple and for the city wall and for the house to which I go.” So the king granted me these requests, for the good hand of my God was on me.
Because of your temple in Jerusalem, kings bring tribute to you.