Ezra 4:20

20 Jerusalem has had powerful kings who have ruled the whole [province] west of the Euphrates. Taxes, fees, and tolls were paid 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 letter you sent me has been read word for word in my presence.

19 I gave the order, and a search was made. I discovered that this city has a long history of uprisings against kings. Its inhabitants are guilty of treason and rebellion.

20 Jerusalem has had powerful kings who have ruled the whole [province] west of the Euphrates. Taxes, fees, and tolls were paid to them.

21 So order these men to stop rebuilding. Keep this city from being rebuilt until I give the order.

22 Be careful not to neglect your duty in this matter. Why should I, the king, suffer any more harm?