Ezra 4:20

20 also that there have been powerful kings over Yerushalayim who ruled all the territory beyond the River; and tribute, taxes 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 us has now been translated for me.

19 I ordered a search made, and it was found that this city has a long history of revolt against kings, that rebellion and sedition have been fostered there;

20 also that there have been powerful kings over Yerushalayim who ruled all the territory beyond the River; and tribute, taxes and tolls were paid to them.

21 "So now, order that these men stop work and that this city not be rebuilt until I order it.

22 Take care not to neglect your duty; otherwise the harm may increase, to the damage of the king."