Nehemiah 11:23

For there was a commandment from the king concerning them and a firm regulation for the song leaders day by day.

Ezra 6:8-9

Moreover, I issue a decree concerning what you are to do for these elders of Judah in the rebuilding of this house of God: the full cost is to be paid to these people from the royal treasury out of the taxes of the provinces beyond the River, and that without delay.

1 Chronicles 9:33

Now these are the singers, heads of fathers’ households of the Levites, who lived in the chambers of the temple free from other service; for they were engaged in their work day and night.

Ezra 7:20-24

The rest of the needs for the house of your God, for which you may have occasion to provide, provide for it from the royal treasury.

Nehemiah 12:47

So all Israel in the days of Zerubbabel and Nehemiah gave the portions due the singers and the gatekeepers as each day required, and set apart the consecrated portion for the Levites, and the Levites set apart the consecrated portion for the sons of Aaron.

Treasury of Scripture Knowledge

Summary

For it was the king's commandment concerning them, that a certain portion should be for the singers, due for every day.

Bible References

The king's

1 Chronicles 9:33
Now these are the singers, heads of fathers’ households of the Levites, who lived in the chambers of the temple free from other service; for they were engaged in their work day and night.
Ezra 6:8
Moreover, I issue a decree concerning what you are to do for these elders of Judah in the rebuilding of this house of God: the full cost is to be paid to these people from the royal treasury out of the taxes of the provinces beyond the River, and that without delay.
Ezra 7:20
The rest of the needs for the house of your God, for which you may have occasion to provide, provide for it from the royal treasury.