потому что от царя было о них особое повеление, и назначено было на каждый день для певцов определённое содержание.
The musicians were under the king’s orders, which regulated their daily activity.
For there was a command from the king concerning them, and a fixed provision for the singers, as every day required.
For there was a commandment from the king concerning them and a firm regulation for the song leaders day by day.
Their daily responsibilities were carried out according to the terms of a royal command.
For it was the king's commandment concerning them, that a certain portion should be for the singers, due for every day.
For it was the king’s command concerning them that a [g]certain portion should be for the singers, a quota day by day.
For it was the king's commandment concerning them, and there was a settled portion for the singers, due for each day.