Ezra 4:20

20 And there were powerful kings in Jerusalem, and they ruled over all the beyond the river, and abundant revenues and tribute were given to them.

Ezra 4:20 Meaning and Commentary

Ezra 4:20

There have been mighty kings also over Jerusalem, which have
ruled over all countries beyond the river
As David and Solomon; and the account of these they had in their records, see ( 2 Samuel 8:1 ) ( 1 Kings 4:21 1 Kings 4:24 )

and toll, tribute, and custom, was paid unto them;
as appears from the places referred to; and this served to strengthen the insinuation made to the king, that if these people were suffered to go on building, he would lose his tribute and taxes in those parts.

Ezra 4:20 In-Context

18 The tribute-gatherer whom ye sent to us, has been called before me.
19 And a decree has been made by me, and we have examined, and found that city of old time exalts itself against kings, and that rebellions and desertions take place within it.
20 And there were powerful kings in Jerusalem, and they ruled over all the beyond the river, and abundant revenues and tribute were given to them.
21 Now therefore make a decree to stop the work of those men, and that city shall no more be built.
22 that ye be careful of the decree, to be remiss concerning this matter, lest at any time destruction should abound to the harm of kings.

The Brenton translation of the Septuagint is in the public domain.