Ezra 4:20

20 Powerful kings have reigned there and have ruled over the entire province of West-of-Euphrates, collecting taxes and revenue.

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 letter which you sent has been translated and read to me.

19 I gave orders for an investigation to be made, and it has indeed been found that from ancient times Jerusalem has revolted against royal authority and that it has been full of rebels and troublemakers.

20 Powerful kings have reigned there and have ruled over the entire province of West-of-Euphrates, collecting taxes and revenue.

21 Therefore you are to issue orders that those men are to stop rebuilding the city until I give further commands.

22 Do this at once, so that no more harm may be done to my interests."