Ezra 4:20

20 for why there were in Jerusalem full strong kings, which also were lords of all the country that is beyond the flood; also those kings took tribute, and toll, and rents. (for there were very strong kings in Jerusalem, who were also lords of all the province that is west of the Euphrates River; and those kings took tribute, or taxes, and tolls, and rents.)

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 accusing (The accusation), which ye sent to us, was read openly before me;

19 and it was commanded of me, and they reckoned, and they found, that that city rebelleth of eld days against kings, and dissensions and battles be raised therein; (and I commanded that they search in The Chronicles, and indeed they found, that that city in days of old rebelled against kings, and dissensions and battles were raised up there;)

20 for why there were in Jerusalem full strong kings, which also were lords of all the country that is beyond the flood; also those kings took tribute, and toll, and rents. (for there were very strong kings in Jerusalem, who were also lords of all the province that is west of the Euphrates River; and those kings took tribute, or taxes, and tolls, and rents.)

21 Now therefore hear ye the sentence, that ye forbid those men to build, and that that city be not builded (again), till if peradventure it be commanded of me. (And so now listen ye to my decree, which is, that ye forbid those men to continue to build, and that that city not be rebuilt, unless, and until, I command it to be done.)

22 See ye, that this behest be not fulfilled negligently, and evil increase little and little against (the) kings. (See ye, that this command be not carelessly fulfilled, for then evil would increase little by little against the king.)